Originally Posted by IceLeopard

You don't need a calculator or do math in your head. Charge is $5.31. $10 tendered. You start with the charge and count up to the tendered amount, starting with pennies. 4 cents brings you up to $5.35, a nickel brings you up to $5.40, a dime to $5.50, two quarters to $6. Four $1 bills brings you to $10. Takes about a quarter of the time to do than it does to explain!