Lucy has overdrawn her checking account by $2.15.
(going over Lucy's math in her checkbook)
Barnsdahl: Your addition is perfect.
Lucy: Thank you.
Barnsdahl: However, when we write a check, we do not add to our balance, we subtract. How could you have made such a mistake!!
Lucy: Well, to tell you the truth, I--I don't like subtraction.
Lucy: (to elephant standing on a $500 bill) Pardon me, but if you lift your foot, I promise to vote Republican.