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

not register the milk,” I said, pointing to the dark screen.

“Let me see the administrator console,” Kevin said, tapping a key pattern on the side of the monitor.

He did not cover the screen, and I watched the system settings flash in yellow text: Sensitivity Margin Adjusted to Zero Percent.

Beneath it, a flashing red line showed that the automatic error continue reading …