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