Jennifer and Paul, who file a joint return, have taxable income of $109,942 and the following tax liability: $19,750 * 108 = ($80,250 $19,750) X 12 = ($109,942 $80,250) X 228 = Total tax liability $ 1,975.00 7,260.00 6,532.24 $ 15,767.24 Their marginal tax rate is