Liva s Lumber Inc manufactures three types of plywood The following table summarizes the production hours per unit in each of three production operations and other data for the probl Operations hours Plywood Grade A I 2 units units II Grade B Grade X 10 Maximum time available 950 450 5 2 5 3 III 4 2 2 700 How many units of each grade of lumber should be produced Grade A Grade B Profit Unit 40 30 20