Bruce Corporation makes four products in a single facility. These products have the following unit product costs: Additional data concerning these products are listed below. The grinding machines are potentially the constraint in the production facility. A total of 44,000 minutes are available per month on these machines. Direct labor is a variable cost in this company. Note: Round your intermediate calculations to 2 decimal places. Multiple Choice $10.11 $13.52 $5.06 $17.21