Four products are manufactured in the Big W Compan's one factory. Each of the products must go through a grinding process. These products have the following unit product costs: Products Direct materials Direct labor Variable manufacturing overhead Fixed manufacturing overhead Unit product cost $15.20 $11.10 $1190 $11.50 20.30 28.30 34.50 41.30 5.20 3.603.50 4.10 27.40 35.70 2750 38.10 $6810 $78.70 $7740 $95.00 Additional data concerning these products are listed below. Products 8 Grinding minutes per unit Selling price per unit Variable selling cost per unit Monthly demand in units 4.70 6.20 5.20 4.30 $77.00 $94.40 $88.30 105.10 $3.10 $ 2.10 $4.20 $2.50 4,900 4,900 3,900 2,900 The grinding machines are potentially the constraint in the production facility. The grinding machines have a total of 54.500 minutes avail At Big W, 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? able per month. O 20,380 O 86,160 O 54,500 O63,130