tes Outdoor Luggage Inc. makes high-end, hard-sided luggage for sports equipment. Data concerning three of the company's most popular models appear below. Selling price per unit Variable cost per unit Plastic injection moulding machine processing time required per unit Xge of plastic pellets per unit Required: ski Golf Fishing Guard Guard Guard $260 $120 $330 $100 $205 $135 9 min 12 kg 12 min 7 kg 11 min 11kg 1-a. The total time available on the plastic injection moulding machine is the constraint in the production process. What is the contribution margin per unit of the constrained resources for Ski Guard, Golf Guard and Fishing Guard? Ski Guard Golf Guard Fishing Guard Selling price per unit Variable cost per unit Contribution margin per unit Plastic injection molding machine processing time required to produce one unit Contribution margin per unit of the constrained resource minutes per minute minutes per minute minutes per minute