Tims 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	$	2,000		$	1,050			$	110
Medium-quality		1,100			770				40

Three-quarters of the shops sales are medium-quality bikes. The shops annual fixed expenses are $239,400. (In the following requirements, ignore income taxes.) Required: 1. Compute the unit contribution margin for each product type. 2. What is the shops sales mix? 3. Compute the weighted-average unit contribution margin, assuming a constant sales mix. 4. What is the shops 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 $128,250? Assume a constant sales mix.