Hydro Systems Engineering Associates, Inc., provides consulting services to city water authorities. The consulting firm's contribution- margin ratio is 20 percent, and its annual fixed expenses are $120,000. The firm's income-tax rate is 25 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 $48,000? 3. What level of revenue for consulting services must the firm generate to earn an after-tax net income of $48,000? 4. Suppose the firm's income-tax rate rises to 27 percent. What will happen to the break-even level of consulting service revenue? Complete this question by entering your answers in the tabs below. Req 1 to 3 Req 4 Calculate the firm's break-even volume of service revenue. How much before-tax income must the firm earn to make an after- tax net income of $48,000? What level of revenue for consulting services must the firm generate to earn an after-tax net income of $48,000? Break-even volume Before tax income Service revenue