Why Martha Saved Five Hundred Paper Receipts From Her Weekly Grocery Trips

scan failures,” he said. “When the customer puts an item in the bag, the scale measures it. If it does not match the database weight by more than two ounces, it locks the terminal.”

“But these errors,” I said, pointing to a receipt from May, “are for standard items. Bread. Milk. Things that do not change weight.”

“That is because the software update continue reading …