Bruce Corporation makes four products in a single facility. These products have the following unit product costs: Direct materials Direct labor Variable manufacturing overhead Pixed manufacturing overhead Unit product cost Products A B C D $13.20 $ 9.10 $ 9.90 $ 9.50 18.30 26.30 32.50 39.30 3.20 1.60 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. Grinding minutes per unit Selling price per unit Variable selling cost per unit Monthly demand in units Products 2.70 3.40 3.20 2.30 $75.00 $92.40 $86.30 $103.10 $ 1.10 $ 0.10 $ 2.20 $ 0.50 2,900 2,900 1,900 2,100 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 for products