I really need help with this question. I keep coming up with an answer no where near the choices. Please explain.

TarHeel Corporation reported pretax book income of $1,018,000. During the current year, the net reserve for warranties increased by $100,900. In addition, tax depreciation exceeded book depreciation by $204,500. Finally, TarHeel subtracted a dividends received deduction of $53,600 in computing its current year taxable income. TarHeel's accounting effective tax rate is:

Multiple Choice

21%

19.89%

18.79%

17.68%