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Textiles Corp. is currently determining its product mix but is constrained by the number of machine hours available. Textiles Corp. makes one style each of a hat. shirt and pants. There is a minimum quantity of 1,000 and a maximum quantity of 10,000 units for each of these products. Available machine hours are 10.000 hours per year. Below is information for each product: Selling price Variable cost per unit Machine hours per unit Hat $ $ 10.00 6.00 2.00 Shirt $ 5 20.00 12.00 2.50 Pants 525.00 5 14.00 3.00 a. Calculate the contribution margin per constraint for each product b. What product mix should be used to maximize operating income? (e. how many units of each product should be produced!)