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 problem. Plywood Grade A Grade B Grade X Maximum time available Operations (hours) I 2 5 10 900 II 2 5 3 сл 400 III 4 2 2 600 Profit/Unit $40 $30 $20 How many units of each grade of lumber should be produced?

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