Just yesterday I had to rescue a young cashier at Walgrens who was about to have a stroke from the stress of making change from the $20 I gave her for a prescription.
The other day I spent $11.19 at the grocery and asked for $40.00 back with my ATM payment. The clerk got out a pencil and paper and scribbled for a while. I thought she was going to cry, but the supervisor came by and rescued her.