Broze Company makes four products in a single facility. These products have the following unit product costs:

	Products
	A	B	C	D
Direct materials	$13.00	$8.90	$9.70	$9.30
Direct labor	18.10	26.10	32.30	39.10
Variable manufacturing overhead	3.00	1.40	1.30	1.90
Fixed manufacturing overhead	25.20	33.50	25.30	35.90
Unit product cost	$59.30	$69.90	$68.60	$86.20

Additional data concerning these products are listed below.

	Products
	A	B	C	D
Grinding minutes per unit	2.50	3.00	3.00	2.10
Selling price per unit	$74.80	$92.20	$86.10	$102.90
Variable selling cost per unit	$.90	$-.10	$2.00	$.30
Monthly demand in units	2,700	2,700	1,700	1,900

The grinding machines are potentially the constraint in the production facility. A total of 52,400 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?