Hope you are doing good,
Here are your 10 UPC codes:
UPC code is unique product code which is provided by us. By using this code on Amazon seller central account you can list your product on Amazon.UPC is required for product listing and when you convert your stock to FBA that time amazon provide you a label that need to put on product carton.
You need one UPC for one product and it really doesn’t matter how many products you are selling with it. You don’t need to print UPC on each product, you need to put label on barcode label provided by amazon on product carton in which you sending stock to FBA.