Amazon FBM upload spreadsheet creation and training in how to use it

I need a flat file spreadsheet creating for my products on my website, to add them to our new Amazon account selling via FBM . The spreadsheet needs to have one tshirt product loaded, complete with all size (15 of them) and colour (9 of them) variations... (Budget: $30 - $250 USD, Jobs: Amazon, Amazon Web Services, Data Entry, Data Management, Excel, Inventory Management, Product Management)