When I owned my pizza place many years ago, we didn't have a cash register at all, every employee was given a "bank" of small bills at start of shift. Then everyone pocketed the money and made change, and I'd cash everyone out at end of shift. One time we had a gunman come in to rob me and wanted to know where's the cash register. I told him we don't take cash, only credit, and he left with nothing. Cops caught him even.