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Shelby Company produces three products: X,Y, and Z. Data about the three products are as follows: Demand for the company's products is very strong. With far more orders each month than the company can produce with the avaiable raw materiats. The same material is used in esch product. It costs $3 per pound and the maximum amount the company can obtain is 5.000 pounds per month. If Shelby dedicates its 5,000 pounds of materials to their highest and best use, what is the resulting contribution margin? $20,000 123,000 $160,000 $14,000 $35000