Ken's Bicycle Shop sells mountain bikes. For purposes of a cost-volume-profit analysis, the shop owner has divided sales into two categories, as follows: Product Category Sales Price Invoice Cost Sales Commissions High quality $500 $275 Medium quality 300 $25 135 75 The shop anticipates selling 480 bicycles, 360 of which will be medium quality. Annual fixed costs are $65,000. Ignore taxes a. What is the shop's break-even sales volume in dollars? b. How many bicycles of each type must the firm sell to earn a target net income of $48,750