Tim's performance pizza is a small restaurant in philadelphia that sells gluten-free pizzas. tim's very tiny kitchen has barely enough room for the three ovens in which his workers bake the pizzas. tim signed a lease obligating him to pay the rent for the three ovens for the next year. because of this, and because tim's kitchen cannot fit more than three ovens, tim cannot change the number of ovens he uses in his production of pizzas in the short run.