Ez is csak egy tipp, melyet egy ismerősömtől kaptam:

"This is when you have to cancel out a transaction for some reason. You started it and then had to cancel it. They have to explain why the cash drawer was opened, or why there is some recorded info on the paper tape, or electronic tape of the cash register.

Either someone didn't have money to pay, or changed their mind, or just wanted price information, or the ringing up of the items by the cashier was done incorrectly."