i dont know what I am doing wrong. letter A is not correct and i dont know why

(Corporate income tax) Boisjoly Productions had taxable income of $19.1 million. a. Calculate Boisjoly's federal income taxes by using the corporate tax rate structure in the popup window. b. Now calculate Boisjoly's average and marginal tax rates. c. What would Boisjoly's federal income taxes be if its taxable income was $29.8 million? d. Now calculate Boisjoly's average and marginal tax rates with taxable income of $29.8 million. a. Calculate Boisjoly's federal income taxes. The total tax due is \$ (Round to the nearest dollar.) (Click on the following icon in order to copy its contents into a spreadsheet)