Assume a company makes only three products, A, B, and C: Selling price per unit Variable cost per unit Machine-hours per unit Product A Product B Product C $ 85 $65 $ 45 $ 35 $25 $ 20 2.75 3 1.5 The company does not have enough machine-hours available to satisfy demand for all of its products. Product A's contribution margin per unit of the constraining resource is closest to: Multiple Choice $18.18 $50.00 $137.50 Multiple Choice O $18.18. O $50.00. O $137.50. $51.00