Keegan: You don't pay in cash often, do you?
And I do not mean this as an insult to any cashiers out there. I'm looking at you, hiring manager. Check basic math skills first!
The only way for Dilbert to give him 7.14 was if he had at least two ones. So he should have just given him 2.14 and got a quarter back. Instead of giving him either a five or five ones which would just be given right back.