Dairy signs a contract with School to provide all the milk School needs for the upcoming school year.The contract states School will pay Dairy a set price per unit (carton of milk) and School will order all the milk it needs (requires) from Dairy (an exclusive supplier contract).About half way through the contract (about the time the third quarter is to start) Dairy alleges the price of raw milk has increased so much that School needs to pay more money per unit otherwise Dairy will not be able to fulfill the contract terms.