JSON-1441 Inc. produces Products X5, Y8, and Z9. The following table provides per unit information relating to the three products: JSON-1441 has enough demand to sell 750 units of each product per month. Each product requires the same direct materials in its production. The direct materials cost $3 per pound. The company will at most have 5,400 pounds of the direct materials avallable every month. What is the maximum contribution margin that JSON-1441 can earn per month using its 5,400 pounds of direct materials optimally? $31,750 $29,250 $12,600 $16.650