Chuck, a single taxpayer, earns $168,000 in taxable income and $21,750 in interest from an investment in City of Heflin bonds. (Use the U.S. tax rate schedule.) (Do not round intermediate calculations. Round your answers to 2 decimal places.)

a. If Chuck earns an additional $47,250 of taxable income, what is his marginal tax rate on this income?

Schedule X-SIngle If taxable ncome is But not over: over: The tax is: 0 $ 9,325 $ 9,325 $ 37,950 $ 9 1 ,900 $191,650 $41 6,700 $418,400 $ 37,950 $ 91,900 $ 1 9 1 ,650 $416,700 $41 8,400 10% of taxable income $932.50 plus 15% of the excess aver $9,325 $5.226.25 plus 25% of the excess over $37,950 $ 1 8.71 3.75 plus 28% of the excess over $91,900 $46,643.75 plus 33% of the excess over $191,650 $ 1 20,9 10.25 plus 35% of the excess over $416,700 $12 1,505.25 plus 39.6% of the excess cver $418,400