So live it up! Do some math. Buy a new calculator for the one you love. Or, if you're less of a number guru, just buy yourself something nice (at J.Crew!) and race to calculate the sales tax before the cash register.  Maybe if you're really lucky you'

ll get to calculate a sale (I'm thinking a nice and easy 75% off).

Ah, there's nothing quite as special as when shopping becomes educational.