This occurs when purchasing an item and your change is 4 cents, 9 cents, 14 cents, etc, and the teller rounds up your change to the next highest denomination becuase they're cool shit and pennies are ridiculous.
a buys a coffee. b (teller) does the change round-up.
a: Thanks dude.
b: No prob. I hate this job anyways.
a: Yeah, screw the man.