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 commissionhigh-quality $500 $275 $25medium-quality 300 135 15three-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.)required1. compute the unit contribution margin for each product type2. 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. (should have a seperate answer for high quality and medium quality)compute the weighted-average unit contribution margin, assuming a constant sales mix. (round your answer to 2 decimal places.)