Bruce Corporation makes four products in a single facility. These products have the following unit product costs:ProductsA B C DDirect materials $ 13.40 $ 9.30 $ 10.10 $ 9.70Direct labor 18.50 26.50 32.70 39.50Variable manufacturing overhead 3.40 1.80 1.70 2.30Fixed manufacturing overhead 25.60 33.90 25.70 36.30Unit product cost $ 60.90 $ 71.50 $ 70.20 $ 87.80Additional data concerning these products are listed below. ProductsA B C DGrinding minutes per unit 2.90 3.80 3.40 2.50Selling price per unit $ 75.20 $ 92.60 $ 86.50 $ 103.30Variable selling cost per unit $ 1.30 $ 0.30 $ 2.40 $ 0.70Monthly demand in units 3,100 3,100 2,100 2,300The grinding machines are potentially the constraint in the production facility. A total of 52,800 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