My daughter and I went through the McDonald's take-out window and I gave the clerk a $5 bill. 
Our total was $4.25, so I also handed her a quarter. 
She said, 'you gave me too much money.' I said, 'Yes I know, but this way you can just give me a dollar bill back. 
She sighed and went to get the manager, who asked me to repeat my request. 
I did so, and he handed me back the quarter, and said 'We're sorry but we could not do that kind of thing.' 
The clerk then proceeded to give me back $1 and 75 cents in change. 
Do not confuse the clerks at McDonald's or the managers either, as far as that goes.