A delivery person uses a service elevator to bring boxes of books up to an office. The delivery person weighs 190 lb and each box of books weighs 40 lb. The

A delivery person uses a service elevator to bring boxes of books up to an office. The delivery person weighs 190 lb and each box of books weighs 40 lb. The maximum capacity of the elevator is 1060 lb. How many boxes of books can the delivery person bring up at one​ time?