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1.) Bob's Textile Company sells shirts for men and boys. The average selling price and variable cost for each product are as follows: Men's Boys Selling price $28.80 $24.00 Variable cost $20.42 $16.80 Total fixed costs $38,400 Required: Assume the sales mix is 2 men's shirts for each boy's shirt: a. What is the weighted contribution margin per unit of the mix? b. What is the break-even point in units for each type of shirt? c. What is the operating income, assuming sales total 9,000 shirts