TB MC Qu. 13-156 (Algo) Bruce Corporation makes four products... 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 53,400 minutes are available per month on these machines. Direct labor is a variable cost in this company. calculations to 2 decimal places.) Multiple Choice $15.31