Adding eBay Categories and Item Specifics to my upload file

Hi- I have 3,583 products that I need the following adding to my spreadsheet: eBay Categories ID's: (MUST be the most relevant category for the product. I have a number of tools that you can use to find the eBay category, the best way is to search for the product on ebay and find the ID from another sellers listing, same with adding item specifics) Item Specifics: These will be added to the Attribute1Name column and Attribute1Value column. There are 3 Attribute columns that you can use. Not all products will have or require 3 attribute fields but some do. I have a compete list of all eBay item specific that you can use. Please note: You can not add random keywords into these fields, they have to be eBay item specifics. My eBay shop category ID- I will provide a list of category numbers. All the Categories are listed on the spreadsheet, so its simply a case of finding the correct category and copy & pasting the ID into the correct field. I have provided a sample for reference, the fields you will be working with are below, I have also highlighted them in the example file. eBay Category List Attribute1Name Attribute1Value Attribute2Name Attribute2Value Attribute3Name Attribute3Value eBay Store Category Name Any questions please ask. We are looking to get this done by the 27th Feb, so we need to move fast. Thanks