Working on a Point of Sale system and trying to understand how to convert a smaller barcode to its longer registered one:
Example is for Coca-Cola Classic, 20 Oz. Bottle whose barcode shows as 04904403 and getting it to its correct UPC 049000000443 (https://www.upcitemdb.com/upc/49000000443)
That is the UPC-E code. You are looking to convert UPC-E code to UPC-A.
See more about Universal Product codes here: https://en.wikipedia.org/wiki/Universal_Product_Code
You can also look at this already answered question: How to convert a UPC-E barcode to a UPC-A barcode?
You might also want to look at this website: https://www.taltech.com/barcodesoftware/symbologies/upc
