The following are the selling price and variable costs for one unit of each of DEF Inc company's three products: Product Selling Price Direct Materials Direct Labour A B C $67.50 $83.00 $97.50 20.50 42.00 58.50 24.00 18.00 12.00 7.50 5.50 Variable Manufacturing 4.50 Overhead The demand for the company's product far exceeds its capacity to produce. management is trying to determine which product to concentrate on to fill its orders. The direct labour rate is $6 per hour, and only 3,000 hours of labour time are available each week. What is the contribution margin per hour for product C