No UPC

I was checking out at the local Foodland with just a few items and the lady behind me put her things on the belt close to mine. I picked up one of those "Dividers" that they keep by the cash register and placed it between our things so they wouldn't get mixed. After the girl had scanned all of my items, she picked up the "Divider" looking it all over for the bar code so she could scan it. Not finding the bar code she said to me "Do you know how much this is?" and I said to her "I've changed my mind, I don't think I'll buy that today." She said "OK" and I paid her for the things and left. She had no clue to what had just happened...