Outdoor Luggage Inc. makes high-end hard-sided luggage for sports equipment. Data concerning three of the company's most popular models appear below. Ski Golf Fishing Guard Guard Guard Selling price per unit $310 $265 $340 Variable cost per unit $140 $115 Plastic injection molding machine processing time required to produce one unit 5 minutes 6 minutes 3 minutes Pounds of plastic pellets per unit 6 pounds 15 pounds 6 pounds Required: 1a. The total time available on the plastic injection molding 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 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 per minute Golf Guard per minute Fishing Guard per minute