I just had an interesting interaction with the cashier at the local convenience store.
I bought a bottle of water and a pack of gum for a total of $2.04.
I gave the cashier $3.00, and he handed me $2.04 in change. I returned the change, explaining that the cost was $2.04, but I had only given him $3.00. He took the money and, inexplicably, handed me a single dime. I corrected him again, this time being more explicit, explaining that I was expecting 96 cents. He handed me 96 cents in addition to the dime I was already holding. I gave him back the dime. He looked confused.
When I worked as a cashier, I had to reconcile my cash drawer with a printout from the register at the end of every shift. I would be interested in seeing his reconciliation form.
Also, they didn't have the kind of gum I wanted.