Shelby Company produces three products: product X, product Y, and product Z. Data concerning the three products follow (per unit): Product X Product Y Product Z Selling price $ 80 $ 60 $ 70 Variable expenses: Direct materials 24.00 18.00 4.90 Labor and overhead 24.00 27.00 44.10 Total variable expenses 48.00 45.00 49.00 Contribution margin $ 32.00 $ 15.00 $ 21.00 Contribution margin ratio 40 % 25 % 30 % Demand for the companys products is very strong, with far more orders each month than the company can produce with the available raw materials. The same material is used in each product. The material costs $6 per pound, with a maximum of 5,800 pounds available each month. Required: a. Compute contribution margin per pound of materials used. (Round your answers to 2 decimal places.) b. Rank the order in which you would accept the product orders.