Colt Company produces two skateboard models. Machine time per unit for Hero is two hours and for Flip is one hour. The machines capacity is 1,980 hours per year. Colt can sell up to 728 units of Hero and 824 units of Flip per year. Selling prices and variable costs follow. Hero Flip Selling price per unit $ 156 $ 98 Variable costs per unit 52 56

a: compute the contribution margin per machine hour for each prouct b; determine the best sales mix of product

c; compute the total contribution margin for the best sales mix