I was a mgr. of cashiers for 8 years. I could not believe the number of cashiers that didn't know how. ie customer buys $9.45 for something, hand the cashier a $10.00 bill. The cashier types in $100. and was about to hand the customer change for $100.00. Luckily the customer would not accept it. At that point ALL cashiers were instructed to learn how to count back. :thumbup: