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

A

B

$ 13.40 $ 9.30 $ 10.10

18.50

26.50

32.70

3.40

1.80

1.70

25.60

33.90

25.70

D

$ 9.70

39.50

2.30

36.30

$ 60.90 $ 71.50 $ 70.20 $ 87.80

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

A

B

D

2.90

3.80

3.40

2.50

$ 75.20 $ 92.60 $ 86.50 $ 103.30

$ 1.30

$ 0.30

$ 2.40

$ 0.70

3,100

3,100

2,100

2,300

The 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?