Yes, this. I worked several cashier jobs before becoming an asst manager at a store. I made it all that way & didn't know how to count back change (particularly uneven # s) because the registers did it for me. One of the teens working 4 me actually taught me. Sometimes people get flustered. Give grace and you'll make someone's day better.

Most of this generation kids don't let you help them, they think that you want to take advantage of them.