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: Three-quarters of the shop's sales are medium-quality bikes. The shop's annual fixed expenses are $147,400. (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 $100,500 ? Assume a constant sales mix. Hydro Systems Engineering Associates, Inc., provides consulting services to city water authorities. The consulting firm's contribution-margin ratio is 25 percent, and its annual fixed expenses are $235,000. The firm's income-tax rate is 40 percent. Required: 1. Calculate the firm's break-even volume of service revenue. 2. How much before-tax income must the firm earn to make an after-tax net income of $134,000 ? 3. What level of revenue for consulting services must the firm generate to earn an after-tax net income of $134,000 ? 4. Suppose the firm's income-tax rate changes to 30 percent. What will happen to the break-even level of consulting service revenue? Required information [The following information applies to the questions displayed below.] Serendipity Sound, Inc., manufactures and sells compact discs. Price and cost data are as follows: In the following requirements, ignore income taxes. equired: What is Serendipity Sound's break-even point in units? (Do not round intermediate calculations.)