Excel monthly expenses format average per days jobs

I have encountered a sudden loss of bookmarks in my Google Chrome browser, two days ago. Being a macOS user and having multiple accounts on my browser, I have not tried any troubleshooting steps so far. Fortunately, I maintain a full system backup, which could be utilized for restoration. Key Points: - The disappearance of the bookmarks was sudden and unexplained, so this may require more advanced recovery methods. - Expertise in macOS is crucial, as the recovery should be compatible with this operating system. - The presence of multiple accounts on Chrome might complicate the recovery process, so understanding how to navigate this is essential. - Your deep understanding of Google Chrome's architecture is required to successfully retrieve the lost bookmarks from my full system...

I am in need of a freelancer who can accurately convert my PDF files into Excel. The materials consist mainly of printed, electronically generated text. Given the nature of the work, the ideal candidate should: - Be proficient in both PDF and Excel formats - Have an eye for detail to ensure accuracy - Have experience dealing with extensive text documents - Possess strong typing and data entry skills Please bid if you fully understand the tasks and feel capable to deliver high-quality results. Your attention to detail and commitment to accurately completing tasks would make you an ideal candidate for this project.

I am in need of a skilled web developer to create a web application to display my events and deadlines. I'm looking for a monthly view for a personal user experience. The project will require a developer who's experienced in creating user-friendly, visually appealing web applications. Key requirements: - A monthly calendar view, that is easily navigable and intuitive for personal use - Ability to clearly display a range of different events and deadlines - A clean and modern design that is mobile responsive, as most of my users will be accessing the app on their phones - Some experience with event scheduling software would be a plus I appreciate any insights or ideas that you can bring to the table. I'm looking forward to seeing your proposals.

As a new hotel owner, I need an Excel spreadsheet capable of calculating the optimum number of staff I need based on the number of available rooms, which in my case is 438 rooms. My current hotel staffing level is in its initial stages. The spreadsheet should effectively track staff allocation costs and other related expenses to assist in budgeting. The key tasks it will need to perform include: - Calculating the optimum number of staff - Staff allocation - Expense tracking The ideal freelancer will have experience in human resources, budgeting and have advanced Excel skills. They should understand how staffing impacts hotel operations and costs, with a keen understanding of allocation of resources. Their experience should also include creating Excel spreads...

I need a resume writer to help me craft a compelling resume for mid-career roles in the Software as a Service (SaaS) industry. Key Requirements: - The resume should be in PDF format. - It should be tailored to the SaaS industry, reflecting my mid-career level of experience. - I'm looking for a professional and engaging resume that highlights my skills and accomplishments in a clear and concise manner. Ideal Skills & Experience: - Proven experience in resume writing, especially for mid-career professionals. - Strong understanding of the Software as a Service (SaaS) industry. - Excellent command over the English language with a keen eye for detail. - Ability to deliver the project in a timely manner.

...The primary task is to ensure that new columns added to the database are correctly displayed in the Excel report generated by the application also fix some minor areas that will discuss in detail Key Responsibilities: - Troubleshoot and fix the issue of new columns not being displayed in the Excel report - Ensure that all relevant data is correctly fetched from the SQL Server 2019 database - Implement a seamless solution that does not affect the overall functionality of the application Ideal Skills and Experience: - Strong proficiency in C# programming language - Expert knowledge of SQL Server 2019, including stored procedures and functions - Prior experience with similar tasks involving Excel report generation from SQL data - Excellent problem-solving skills and ...

For my project, I'm looking for a highly detail-oriented professional with brilliant Excel skills. Key responsibilities include: - Managing and transferring both numerical and textual data in an Excel spreadsheet, ensuring the correct placement into columns marked by letters (A, B, C, etc). - You'll not be required to order the data in any specific way, just transfer into the appropriate columns. Skills & Experience: - Proven record in data entry tasks - Strong Excel skills - Ability to understand and interpret numerical and textual data Looking forward to your bids and kicking into this project soon!

I have a raw data stream arriving on my Nvidia Jetson Orin device via /dev/video0. The stream is in Grayscale (RG12, 12bit) format and I need assistance in creating Python code to receive this stream and make it available in a CuPy array. The primary goal is to process this data in real-time for monitoring purposes. It is crucial that the data is not copied between CPU and GPU memory. Key Requirements: - Acquire data stream from /dev/video0 on Nvidia Jetson Orin and store as an array - Use Python 3.9+ for the codebase - Process the data array for real-time monitoring - Do not copy data between CPU and GPU memory, as one frame is 17MB in size Ideal freelancer for this project should have: - Extensive experience with Python, particularly in real-time data processing - Prior experien...

We are seeking an enthusiastic and observant videographer to j...Bangkok, or Koh Samui. The ideal candidate will have a passion for creating authentic and engaging video content, and a smartphone with a good quality camera. Responsibilities: Shoot 10 short videos (55 seconds each) using your smartphone. Capture interesting people, restaurants, and attractions in the amusement parks. Ensure good image quality and stable shots. Videos should be shot in landscape format (9:16). Qualifications: Good smartphone camera skills and experience shooting short-form videos. An eye for detail and the ability to capture interesting and engaging footage. Ability to work independently and reliably. Good English language skills. We need Content like this , Please apply only if you are righ now i...

Hello! I need someone who is an expert in web programming with PHP to translate any kind of PDF for free in using PHP. This PDF must not lose its quality. It must remain intact and it must preserve the ORC format, style and all. I want the translation to be exactly like the one from onlinedoctranslator.com. I know you're going to tell me that the Google Translate api isn't free, but you can use this library (link removed) . Then it has to choose the number of pages in the PDF. Even if the PDF is 100 pages or more, it must be able to translate it. It must support encrypted PDFs and PDFs protected by passwords. I will use your code in my site. You can visit it and you'll see that the PDF translation is missing. I've told you everything and I hope you'll give ...

I am in need of a skilled video editor to work on editing my YouTube 4k videos. The average length of the videos is more than 10 minutes and I would like the editing style to be documentary. Key Responsibilities: - Edit YouTube 4k videos - Maintain a documentary editing style - Work with videos longer than 10 minutes Ideal Skills and Qualifications: - Proficiency in video editing software - Experience in editing long-form content - Understanding of documentary editing style - Familiarity with YouTube content creation (preferred, but not required) Note:- I'll provide an audio about 10 min long or more which will be in hindi language,the editor should accurately edit that audio into video with every details as been talked in video.

Hello^^^^. I'm using Amazon AWS and would ...transmissions, real-time monitoring, data recovery, backdoor checking, backdoor checking and deletion of compromised files, attack root identification and blocking, suspicious process occupation identification and recovery, server hacking analysis, server access history tracking, password recovery and complexity setting, virus and malicious software checking,,data leakage prevention.....etc My current monthly budget is about $50, Please send me a proposal/chat with as much as you can about what you can do to secure your Linux server and I will check them all and get back to you. **You will be required to write a weekly report (anything related to security) to check the security status of the server every week. **Daily server check...

I'm in need of an experienced data entry specialist who can assist in uploading 850 products onto my online store. You will be provided with the necessary product information (description, price, specifications) in the format of Excel/CSV files. Your tasks will include: - Accurate data input of all relevant product details - Verification and correction of any existing data entries - Ensuring all listings are in sync with their corresponding inventory Ideal Skills: - Experience in data entry, particularly e-commerce product listing is preferred - Proficiency in Excel - Attention to detail and accuracy are extremely essential - Fast typing speed with a keen eye for details. Please only bid if you have relevant experience, and can start work promptly.

I have a simple STL file that I need to be transformed into a 3D model for visualization purposes. This project requires proficiency in SketchUp specifically and making elevation on pdf. Key requirements: - Transforming an existing STL file into a 3D model - The 3D model should be optimized for making 3d images I am looking for an experienced professional w...and making elevation on pdf. Key requirements: - Transforming an existing STL file into a 3D model - The 3D model should be optimized for making 3d images I am looking for an experienced professional who can deliver high-quality and visually appealing 3D models with 2d elavations on autocad or pdf . An understanding of SketchUp is essential for this task. I will attach the product design in STL format upon agreement with a ...

I'm in search of an experienced music producer, preferably with a good understanding of popular DAWs. This is an on-site (monthly salary based) position so you must be available for the duration of the project. Key Requirements: - Proficiency in using DAWs such as Ableton Live, Logic Pro and Fl Studio. - Capable of creating original music tracks. - Experience in enhancing audio quality. - Skills in mixing and mastering tracks. Music Style: - The genres I'm focusing on are Bollywood, Punjabi, and Haryanvi. If you have a knack for music production, a good understanding of DAWs, particularly Ableton Live, Logic Pro, and Fl Studio, and experience in working with the music styles mentioned above, please feel free to reach out.

I need assistance in creating Marathi subtitle files in SRT format for five separate videos on YouTube. Each video is approximately 20-25 minutes long. The subtitles should be in Marathi and match the spoken content in the videos verbatim. Non-verbal elements such as background music, sound effects, and speaker identification do not need to be included. The focus is solely on the spoken content. The freelancer shall deliver one subtitle per day and complete the project in five days.

I'm looking for a professional who can assist me with the typing of my novel manuscript. Your responsibilities will include: - Accurately typing out my novel - Formatting the typed content into an e-book format The ideal freelancer for this job would be experienced in: - Typing - MS Word - Excel calculations - E-book formatting Having an RS-CIT certificate would be a major plus. The ability to pay close attention to detail and produce error-free work is paramount. Experience in typing and formatting novel manuscripts is highly preferred. Finally, quick turnaround time is necessary for the successful completion of this project.

I'm looking for a financial expert skilled in Tally ERP9 to help with specific bookkeeping tasks. This includes bank reconciliation for 1-5 accounts on a monthly basis, as well as the generation of financial statements. Key Responsibilities: - Reconciliation of 1-5 accounts monthly using Tally ERP9 - Generation of monthly financial statements The ideal candidate should: - Be proficient in Tally ERP9 - Have prior experience in bank reconciliation - Possess a strong understanding of financial reporting I need someone who is detail-oriented, has excellent organizational skills, and can provide accurate financial records in a timely manner. Prior experience with similar tasks is a definite plus.

I'm looking for an experienced freelancer who can create an Excel calculator for historical cryptocurrency prices from Binance and Luno. The calculator should also include fiat exchange rates for major currencies such as ZAR/USD bank sell rates Key Requirements: - Retrieve historical price data from Binance and Luno - Incorporate USD, and ZAR exchange rates - Organize the data and create user-friendly interface - Ensure accuracy and reliability of the calculator - Prioritizing the preservation of data privacy Ideal Skills: - Proficiency in Excel and data manipulation - Familiarity with cryptocurrency exchange APIs - Knowledge of major fiat currency exchange rates - Strong analytical and problem-solving abilities Please include your relevant experience in your applicat...

I need cad models made of these clasps in matrixgold 3dm format. These are approx 23 designs. I want wholesale price dont contact me if your prices are too high

I am gearing up for a new product launch on Amazon. I need a creative and experienced designer who can craft a compelling letter and card design to promote this new product. - The main objective of these designs is to promote and gener...designing promotional materials for e-commerce platforms like Amazon. - Proficiency in crafting engaging and sales-driven content. - Ability to blend creativity with strategic marketing focus. - Experience in incorporating QR codes in printed materials. - A good eye for design aesthetics that align with modern e-commerce trends. Letter Size A4 size Card Size 10cm (Height) * 14Cm (Weight) - i want 3 format images 1. white colour 2. Black colour 3 . actual colour i selected - i need source file - Try to avoid more colour If any question dm me.. ...

...through OTP) c) GST Number (if available ) d) Google map location (if available) after successful registration customer can login and request quotations 3. All the products details like: Product Name, photo, description, features, pdf (data sheet), warranty information, stock (available quantity), sale prices etc. can be uploaded directly through portal and mobile app and also can be uploaded through excel sheet with serial number of all products. 4. Customer can see all the uploaded products and can request for quotation. There is no need to show the available quantity (stock) to customers. 5. Admin can see the requested quotes where the prices and quantity will be reflected of all the products in quotation. Admin can edit the prices manually and can share and download the requ...

I would like to see the result statistic in %. Important, when i refresh the excel i always want to see the last 5, last 10 and last 15 results.

I am looking for an expert who can create a professional and captivating PowerPoint presentation pertaining to Business and Marketing. This presentation is specifically targeted at business executives. Key Requirements: - Exceptional PowerPoint skills - Proficiency in integrating d...Proficiency in integrating data, text and images in a visually appealing manner - Knowledge and experience of business and marketing principles - Strong understanding of presentations designed for a high-level corporate audience The ideal freelancer should have proven experience creating engaging and professional presentations, with a knack for conveying complex business concepts in a digestible format. I value concise, clear, and visually compelling slides that will hold the interest of business e...

Hello, I am looking for a pinescript programmer who is able to adjust an ASGMA indicator (ALMA Smoothed Gaussian Moving Average) in Tradingview. Mandatory - I need to find a way to scan 1440 minutes (minute-by-minute) with a simple price action condition. Ideally on multiple coins. I am aware there is a 40 timeframes/coins limit in Tradingview but I am sure there is an expert out there who can find a workaround and make this work. Thank you. Martin

I am looking for a skilled web UX designer capable of creating a user-friendly e-commerce platform made with wordpress solutions, for our digital products and online services. Our primary target audience is adults, so th...intuitive shopping experience - Creating a clean, easy-to-navigate layout with a professional aesthetic - Incorporating best practices for e-commerce UX design - Building an engaging platform considering the nature and variety of our digital products The ideal candidate will have solid experience in designing e-commerce platforms catering to a mature audience and experience with PPV or subscription monthly content plattform . A good understanding of digital product sales will be beneficial. In your application, please share examples of similar projects you have ...

I'm looking to enhance our website's SEO strategy to drive more organic traffic, improve search engine rankings, and boost our online visibility. Key Points: - The current performance of our website is average, and we're keen on elevating it to a higher standard. - The primary focus is on Google, so expertise in optimizing for this search engine is crucial. Ideal Skills and Experience: - Proven track record in improving search engine rankings, ideally with a focus on Google. - Extensive experience in implementing successful SEO strategies that significantly increase organic website traffic. - A strong understanding of how to enhance online visibility. - Excellent communication skills to explain the strategies and their benefits to our team.

I have an excel file, need add product categorie on a column - budget 100€

250 backlinks for per website- 4 Website

I am seeking a proficient freelancer to convert 1-5 Word documents to Overleaf Latex Journal Format. These documents include not only text but also graphics and tables, necessitating an eye for detail and good command of layout techniques. The ideal candidate will have extensive experience in Word-to-LaTeX conversions and dealing with documents that are graphically rich. The successful freelancer would demonstrate a deep understanding of LaTeX syntax and formatting, and the capacity to preserve the structure and aesthetics of the original Word documents in the process of conversion. Efficiency and accuracy will be key attributes for this task. I have 4 documents & Latex template. I want those documents to be converted into latex journal.

...to create genuine impact for businesses dealing with unfair practices, and to contribute to a fairer business landscape. My business has been using a business management software which uses STRIPE INC. to process payments. When I bill a client Stripe processes the payment the client makes. Starting in October of 2023 Stripe placed a RESERVES on my account that holds 35% of all payments for 90 days. There reasoning behind this didn't make sense. They said it was because I was high risk for disputes and chargebacks yet I hadn't had any of those for a year. Once I explained my business they would remove the reserve after a couple weeks.. Meanwhile my business came to a halt because that 35% is essential for my business to operate smoothly. the past 6 months they hav...

I am looking for a freelancer to assist with cleaning and analyzing a small dataset in Microsoft Excel. Key Responsibilities: - Data Cleaning: The dataset includes multiple columns and rows that need to be checked for inconsistencies, errors, and duplicates. - Data Analysis: After cleaning, I need the freelancer to perform basic data analysis to extract meaningful insights from the dataset. Ideal Skills: - Proficiency in Microsoft Excel and experience with data cleaning and analysis. - Attention to detail to ensure the dataset is thoroughly cleaned. - Basic data analysis skills to interpret the dataset and present the findings in a clear manner. Please note that the project does not require any specific tools or methods for analysis, but any experience with Pivot Tables,...

Seeking a true SEO/ GBP expert. A marketer with savvy insight on how American consumers thinks and act. You need to be super responsive, detail oriented, and work (typically 3-4 P.M.) EST. Your Eng...person with many years of experience landing companies on the "first page". GBP is way more important as a tool than being ranked number one on a laptop, less prospects are using stationary computers by the day, it's plus 85% hand-held devices. You will be given recourses and other team members to work with, but you will be in charge of what needs to be done, how and when. You will be compensated monthly/ hourly. You will also get bonuses for certain milestones. The owner is also willing to invest in you, help you build your own company if you give us two years of succes...

I'm seeking a skilled video editor to handle editing for my YouTube channel focused on Hinduism facts and mythology. I have a preference for clean and professional editing style. Key Responsibilities: - Edit videos in a clean and professional style - Enhance the visual quality of the content - Implement creative editing techniques where appropriate - Maintain a consistent and engaging video format throughout Ideal Skills and Experience: - Proficiency in video editing software - Previous experience with YouTube content - Understanding of Hinduism, its facts, and mythology - Strong sense of narrative and storytelling - Ability to maintain a high level of quality in 5-10 minute videos Your role will be essential in maintaining the channel's professionalism and engaging my ...

Hello, I need complet the Amazon categories catalogue excel in french

...design and content of the static pages. Ensure new designs are modern, user-friendly, and engaging. Efficiently translate Figma designs into functional React.js components. Design and Update Sections Redesign the following sections, ensuring compatibility with React.js: Home About Us Services (Fundraising, Asset Monetization, Loans, Investor Relations, Knowledge Center, Support, Email/ERP Access) Monthly Newsletter Interactive Content Guest Blogs and Opinions Events Comment Section Subscription Social Media Integration Contact Us Responsive Design Implementation Develop responsive designs that work seamlessly on mobile, tablet, and desktop devices. Ensure consistent user experience across different screen sizes. User-Friendly Navigation Improve website navigation to be more in...

...Tracking - Gradebook Management - Student Information System - Student Registration - Monthly Fee Ledger - Income & Expenses - Payroll - Punching System Linking to Software User Base: The software will be used by more than 500 students and staff members. It's crucial for the software to be scalable and able to accommodate a large number of users. Cross-Device Compatibility: The school management software should be accessible on both desktops and mobile devices. It's essential that users can access the software on the go from different devices. Ideal Skills: - Proficiency in developing school management software - Experience in creating secure and scalable software - Knowledge in integrating payroll, income/expenses, and other relevant features - Abi...

...stickers to be pasted on the boxes. Currently, we are facing issues with obtaining accurate order details, leading to mismanagement and manual intervention. We also want to integrate a monthly subscription feature for parents. The ideal candidate should have a strong understanding of PHP and be able to create clean, efficient, and scalable code. As a PHP Developer, you will be responsible for implementing new features, improving existing functionality, and ensuring seamless integration. This is a fixed-price project with a very tight deadline and budget. We need someone who can complete the work within 3 days. You will receive the existing code, review it, implement the necessary changes, and send back the updated code. Our team will then review it, and once approved, pa...

I'm in need of a freelancer with a high level of proficiency in Microsoft Excel to use conditional formatting over different tabs to help visualize duplications in large sets of numerical data. Ideally, you should not only be skilled in Excel, but also possess a keen eye for patterns and detail. Your job will encompass: - Applying conditional formatting across multiple tabs. - Highlighting duplications in numerical data. - Ensuring easy readability and understanding of the data presented. An understanding of data visualisation techniques would give you a competitive edge for this project. This task will require a close attention to detail and a strong understanding of Excel's conditional formatting tools.

We are looking for experience PHP developer who can complete the project in urgent basis, this is a tight dead line project that need to be finished in 3 days. We have an ecommerce website which is almost 90% ready, we need to add custom filter to it, below is the list of filter s: Price filter color filter Brand filter Categories filter Size filter Material filter and also fix the payment gateway error. Let me know if this can done during the weekend and in given budget I will share the code to finalize candidate.

I have a project that requires the development of a robust Android application. Key Requirements: - Development of a comprehensive Android application with 18 screens - Integration of 12-14 APIs to ensure seamless functionality - Design and implementation of a user-friendly UI/UX - Optimization for performance and security Designs, icons and api's will be provided by us Time 10 days

I have a worldpress site, I want to fully resign the landing page with fully custom design and also the menus should be redesigned and structured based on the requiremnt. I have a detailed document, The creative design skill is must to develop eye catching page, sense of design is must to choose font, color and other style elements. So I need the design and develop both skills. Please start you...When scroll up and down complete page should change. In left side I want the page number indicator too. Each lider will have different background color and background gif for animation. --- Static section --- Static section with decent animations --- Static section --- Static section My budget for this is limited to INR 15,000 and I need this to be deployed on my worldpress hosting within 4-5 ...

I have a small dataset of less than 1,000 rows that requires both data cleaning and formatting. Additionally, I need assistance with data analysis and visualization. This is a one-time project, and I am looking for a skilled individual to handle this for me. Ideal Skills and Experience for this project: - Proficiency in Excel is a must. - Experience with data cleaning and formatting. - Ability to perform data analysis and create visualizations. - Attention to detail and an eye for accuracy.

I'm seeking a skilled analyst to develop a geographic profile map that displays crime rates within the city. The goal of this representation is to visualize and understand patterns in city-level criminal activities. Ideal Skills and Experience: - Proficient in Geographic Information Systems (GIS) or similar software for cartogr...in city-level criminal activities. Ideal Skills and Experience: - Proficient in Geographic Information Systems (GIS) or similar software for cartographic design - Background in criminology or relevant areas is beneficial - Familiarity with data extraction from various online sources Project Responsibilities: - Extract data from internet sources - Analyze and present the data in a geo-visual format - Maintain accuracy in representing crime rates ...

I have an Excel file with a macro that I need to be updated for compatibility with Excel for Mac 2019 or later. The current macro's compatibility with macOS is unknown to me, and I need an expert to assess and modify the code as needed. Key Requirements: - Update the existing macro for compatibility with Excel for Mac 2019 or later. - Ensure the modified macro functions correctly on a MacBook Pro 2018 intel OS Ventura. Ideal Skills and Experience: - Proficient in Excel VBA and macros. - Extensive experience in adapting macros for cross-platform compatibility. - Knowledge of macOS compatibility issues with Excel macros.

I am seeking help with APA 7th edition format for an academic paper. This includes in-text citations, reference list formatting, and title page formatting. The specific requirements for this project are: - Formatting in-text citations according to APA 7th edition guidelines. - Ensuring the reference list is accurately formatted and adheres to APA 7th edition standards. - Formatting the title page according to APA 7th edition guidelines. The ideal candidate for this job would have: - Proficiency in APA 7th edition format. - Strong attention to detail. - Experience in academic editing. The paper is VERY SMALL (less than 2000 words).

...Uncapped Earning Potential: Earn a generous commission of $200-$500 for every website you sell. There's no limit to your income, so the more you hustle, the more you get rewarded! How is your pay calculated? Once You have the ball rolling, If you make 100-200 calls a day and get have very low success rate at around 2 interested business owner per day. You close 1 deal at our $300/month tier plan. You make $300 in one day. If you repeat the same process 20 days a month. You are expected to make $6,000 a month. If you work hard and are great at sales, your success rate will be a lot higher. Flexible Schedule: Set your own hours and work from a location that suits you. This role is perfect for self-motivated individuals who thrive in an independent environment. F...

I require an efficient programmer equipped with the crucial skills in Pine Editor coding. The project involves designing a script based on the 'Trading View' platform to automate my stock market trading strategy. The strategy revolves around Multiple EMA (Exponential Moving Average) crossing. For this specific task, a system with three different EMA lines is preferred. Ideal Skills & Experience: - In-depth knowledge of Pine Editor; - Familiarity with Trading View platform; - A fine understanding of EMA and its implementation in trading strategies; - Previous track record demonstrating similar tasks completed. I emphasize clarity and efficiency in the script to enhance my trading decisions. Please, get in touch if you can confidently handle these specifications.

I need a skilled Excel professional to create a comprehensive spreadsheet for financial tracking. - Data Type: The primary focus will be on financial data, so the spreadsheet must expertly handle these calculations and entries. - Data Organization: The data should be organized by project. This includes clear separation of financial data under different project heads, ensuring a clean and easily navigable interface. - Functionality: I am looking for an Excel expert to incorporate some key features to help make the data easier to understand, like conditional formatting. Ideal Skills: - Proficient in Excel, particularly in managing financial data - Experience in creating user-friendly and logically structured spreadsheets - Understanding of conditional formatting and ot...

I want to make a Incentive structure in the attached excel. I am paying incentive to my staff. I have different types of incentive policy Each Incentive calculation is starting from the month "m" It will be accumulated and the Incentives will be paid on every month of "n" The process will start again and will repeat again. This process will depend upon the value that I am putting in the cells of "m" and "n". You have to correct the formula I have given in the sample or you can make a new formula