The estimator for a heating, ventilation, and air conditioning (hvac) contractor estimated that the new hospital would require 5,840 feet of sheet metal ductwork. the order is too large for a single fabricator, so it was decided to split the order among four fabricators. fabricator 1 received an order for 2,500 feet; fabricator 2 obtained an order for 1,200 feet; and fabricator 3 was awarded a contract for 1,150 feet. how many feet of ductwork would be required of fabricator 4?