Jetz Service Co. (Jetz) (plaintiff) entered into a lease with Salina Properties (Salina) (defendant), whereby Salina agreed to lease coin-operated laundry equipment from Jetz. Jetz has several warehouses in which there are about 1,500 washers and dryers available for lease. Jetz is constantly looking for new locations to install its machines. When there were 16 months remaining on the lease with Jetz, Salina disconnected all of Jetz’s equipment and replaced it with its own. Jetz removed its equipment and returned it to the warehouse. Some, but not all, of the equipment was re-leased to Kansas City. Jetz brought suit to recover its lost profits. Salina argued that Jetz was required and failed to mitigate its damages. The trial court held that Jetz was a lost-volume seller and entered judgment in Jetz’s favor. Salina appealed to the Kansas Court of Appeals.