A sawmill cuts boards for a lumber supplier. When saws A, B, and C all work for 7 hr, they cut 9450 linear board-ft of lumber. It would take saws A and B working together 12.6 hr to cut 9450 ft of lumber. Saws B and C can cut 9450 ft of lumber in 9 hr. Find the rate (in ft/hr) that each saw can cut lumber.