D Question 23 4.7 pts Hydro Systems Engineering Associates, Inc. provides consulting services to city water authorities. The consulting firm's contribution-margin ratio is 20%, and its annual fixed expenses are $120,000. The firm's income tax rate is 40%. What level of revenue for consulting services must the firm generate to earn an after-tax net income of $48,000? O $600,000 O $1,000,000 O $300,000 O $840,000 O $1,200,000