Last year, Rotterdam, Inc. had sales revenue of $980,000. Costs other than depreciation and interest expense were 20 percent of sales. Depreciation expense was $50,000, interest expense was $95,000, and dividends paid were $23,000. The company also received dividends of $8,000 from a company in which it had 30% ownership stake. Which of the following statements is most CORRECT?a. The firm's taxable income was $637,400. b. The firm's after-tax income was $405,564. c. The firm's marginal tax rate was 39 percent. d. The firm's tax for the year was $113,900. e. None of the above