Misring

It also eliminates the chances of misringing the price but not the possibility of entering the wrong PLU code.

Source: wiktionary

On a $19.24 order, Rose again failed to ring up a bottle deposit and misrang the price of ice cream for a total loss of $1.30.

Source: wiktionary

Also , ensure that cash register clerks remain alert to avoid misringing items.

Source: wiktionary

Shaken, he misrung cash into the register something he'd have to make up for or his money would be off;

Source: wiktionary