I'm hungry and it's too early to run off to lunch so I decided to raid the vending machine in the hall. I put in $1 and attempt to buy a 70 cent "3 Musketeers". It seems I need to use exact change. It won't let me pay more. Hitting coin return gives me four quarters, one of which the machine won't accept. Nope, 75 cents is not acceptable, I can't pay 5 cents extra to obtain candy. I fish through my wallet to find a 5 cents and the machine is happy enough to overcharge me 10.