just need service revenue, i cannot figure it out

Exercise 7-33 Consulting Firm; CVP Analysis with Income Taxes (Appendix) (LO 7-1, 7-4, 7-11) Hydro Systems Engineering Associates, Inc. provides consulting services to city water authorities. The consulting firm's contribution margin ratio is 30 percent, and its annual fixed expenses are $280,000. The firm's income tax rate is 45 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 $152.000? 3. What level of revenue for consulting services must the firm generate to eam an after-tax net income of $152.000 4. Suppose the firm's income-tox rate changes to 35 percent. What will happen to the break even level of consulting service revenue? Complete this question by entering your answers in the tabs below. Reg 1 to 3 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 $152,000? What level of revenue for consulting services must the firm generate to earn an after-tax net Income of $152,000? (Do not round Intermediate calculations. Round your final answers to the nearest dollar amount.) Break-even volume Before tax income Service revenue 933.333 276,363