These days, the best cash registers show a picture of the change due when you ring in the amount.
I wonder how many employees get suspected of embezzlement when in fact they simply make mistakes and give away cash.
I recall making a purchase while on a visit back in Memphis, TN. The total was $5.10. So I threw a $10 bill and a dime on the counter. Cashier looked at the dime and said, “Whut’s THAT for?”
I instantly realized that no amount of explanation would remedy the situation, so I just picked up the dime and let the cashier droid do his thing.