Xcelerate Productions Inc. manufactures and sells three different products of different qualities. They are referred to as: Normal, High, and Superior. The accounting department provides the following information on these products: Normal High Superior Selling price per unit Variable costs per unit Contribution margin per unit Machine hours required $34 $29.02 4.98 0.02 $41 $35 6.00 0.04 $56 $52 $4.00 0.08 (a) Determine the contribution margin per machine hour. (Round answers to 2 decimal places, e.g. 15.25.) Contribution Margin Normal High Superior$ per machine hour per machine hour per machine hour