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 Guard Golf Guard Fishing Guard $320 $210 Selling price per unit Variable cost per unit Plastic injection molding machine processing time required to produce one unit Pounds of plastic pellets per unit $250 $110 $215 $155 14 minutes 9 pounds 13 minutes 10 pounds 11 minutes 14 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 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 0 $ 0 $ 0 minutes minutes minutes 0 per minute 0 per minute 0 per minute