Please explain important calculation

Glocker Company makes three products in a single facility. These products have the following unit product costs Product Direct materials 35.00 51.50 57.90 Direct labor 22.40 25.00 15.80 Variable manufacturing overhead 2.20 1.60 1.50 Fixed manufacturing overhead 12.10 7.70 8.30 $71.70 $85.80 $83.50 Unit product cost Additional data concerning these products are listed below 1.40 0.90 Mixing minutes per unit 0.50 80.00 $102.40 95.90 Selling price per unit Variable selling cost per unit 2.80 3.30 3.10 Monthly demand in units 3,000 4.300 2.300 The mixing machines are potentially the constraint in the production facility. A total of 9,120 minutes are available per month on these machines. Direct labor is a variable cost in this company Required a. How many minutes of mixing machine time would be required to satisfy demand for all three products? Total minutes required