Choice "A" is correct. For the accumulated earnings tax, in this case, accumulated taxable income would equal taxable income ($400,000) minus federal income taxes ($100,000) minus the minimum accumulated earnings credit ($250,000) for manufacturing companies or $50,000.
Choice "b" is incorrect. Generally, the accumulated earnings tax is imposed when a corporation has accumulated earnings in excess of $250,000. Thus, the amount of earnings subject to the accumulated earnings tax must first be reduced by the $250,000.
Choice "d" is incorrect. Federal income tax is subtracted from the earnings of a corporation in calculating the amount of excess earnings subject to the accumulated earnings tax.
Choice "c" is incorrect. Accumulated taxable income is $400,000. This amount ($400,000) minus federal income tax ($100,000) minus the credit of $250,000 equals $50,000, which is the excess subject to the accumulated earnings tax.