Bruce Corporation makes four products in a single facility. These products have the following unit product costs Products Direct materials Direct labor Variable manufacturing overhead Fixed manufacturing overhead Unit product cost $13.20 $ 9.10 $ 9.90 9.50 18.30 26.30 32.50 39.30 3.20 1.6 1.50 2.10 25.40 33.70 25.50 36.10 $60.10 $70.70 $69.40 $87.00 Additional data concerning these products are listed below Products Grinding minutes per unit Selling price per unit Variable selling cost per unit Monthly demand in units 2.30 $75.00 $92.40 $86.30 $103.1e $ 1.10 0.10 $ 2.20 0.56 2,900 2,9001,900 2,180 2.70 3.40 3.2 The grinding machines are potentially the constraint in the production facility. A total of 52,600 minutes are available per month on these machines Direct labor is a variable cost in this company How many minutes of grinding machine time would be required to satisfy demand for all four products