Item_id being pulled instead of manufacturer_upc

Hi,

Please find the details of the issue I am facing:

Issue: On the sales receipt - Item SKU id is printed.

Expected: Receipt should display UPC code/id.

When I checked the xstore code, it is looking at the item_id column of the itm_item_cross_reference table and populates the data on the receipt. Also the view port of the sales screen display the data of the item_id column.[Ofcourse the data in the item_id column of the itm_item_cross_reference table, should also have valid entries in the table - itm_item and itm_item_prices. ] Customer wants to display the manufacture_upc on the receipt.