Night of a thousand pizzas

Hollis Elementary School has a pizza problem - a BIG pizza problem. It all started with the brand-new, computerized pizza-maker in the incredibly modern, totally redone lunchroom. Ms. Weinstock made a little mistake when she programmed it for the first-day-of-school pizza lunch. Instead of one hundred extra-large pizzas, she accidently ordered one thousand! Leftover pizza is great to eat, but anyone would get tired of it after a few hundred slice...