How do you calculate max profit from determining how many units should be used. (I provided an example (question B) to help make sense of my question).

The Gant Company produces three items in its manufacturing plant. The plant has a total capacity of 9,600 minutes per month for production. The following information is provided for the products: Products X Y Z Direct material $16 $10 $14 Direct labor (all variable) 15 14 15 Variable overhead 2 3 4 Fixed overhead 2 Unit cost 5532 5511 E Minutes required per unit 5 4 6 Selling price per unit $70 $65 $80 Variable selling expense per unit $5 $4 $2 Monthly demand in units 2,200 1,000 800 Required: a. How many minutes would be required to meet the demand for all three products? b. How many units of each product should Gant product to maximize prot