Very simple POS system for windows

I'm looking for a POS system that is very easy to use even for a none computer skilled person. should work offline, It doesn't matter if it's php, or whatever software as long as it works the admin can: 1- Add product (product name, price) 2- Review total sales of today, week, month(date, time, product sold) can be printed 3- can edit and modify company information in the system that will appear in the bill (we using small receipt printer 4- add user (sales person with password to enter the system and that appears on lower of the bill (sales person: john snow) for example 5- payment method: Cash, credit, others 6- credit and other should be highlighted when printed from statement (please see point number 2) ---------------------------- The front page of the pos system, should look as the picture attached - items on right, customer name on left or sales person can enter the name, [login to view URL] payment and print,