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

bagging area,” Gerald said, turning a page. “They are called transducer load cells.”

“They just look like metal plates to me,” I said.

“They measure weight down to the tenth of an ounce,” Gerald said. “If the software is miscalibrated, the machine thinks you are adding unpaid inventory to your shopping bag.”

I touched the silver schoolhouse continue reading …