Using 2017's tax rules, Amiouny, Inc. had sales revenue of $400,000. Costs other than depreciation and interest expense were 30 percent of sales. Depreciation expense was $12,000, interest expense was $23,000, dividends received were $10,000 and dividends paid were $5,000. Which of the following statements is most FALSE? (Use the corporate tax table.) a. The firm's taxable income was $248,000. b. The firm's average tax rate was 32.25 percent. c. The firm's marginal tax rate was 39 percent. d. The firm's tax for the year was $79,970. e. The after-tax income was $168,030.