Tim’s bicycle shop sells 21-speed bicycles. for purposes of a cost-volume-profit analysis, the shop owner has divided sales into two categories, as follows: product type sales price invoice cost sales commission high-quality $500 $275 $25 medium-quality 300 135 15 three-quarters of the shop’s sales are medium-quality bikes. the shop’s annual fixed expenses are $65,000. (in the following requirements, ignore income taxes.) required: 1. compute the unit contribution margin for each product type. 2. what is the shop’s sales mix? 3. compute the weighted-average unit contribution margin, assuming a constant sales mix. 4. what is the shop’s break-even sales volume in dollars? assume a constant sales mix. 5. how many bicycles of each type must be sold to earn a target net income of $48,750? assume a constant sales mix.