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

to catch you before you started your weekly loop,” Kevin said, holding out the envelope. “We had a bit of a misunderstanding last week in the self-checkout lane, and I want to make sure we set things right.”

“A misunderstanding?” I asked.

“An unfortunate technical glitch,” Kevin said, his fingers jingling the loose coins in his pocket. “The sensors can continue reading …