I keep getting the wrong answer

Campbell, a single taxpayer, earns $400,000 in taxable income and $2,000 in interest from an investment in State of New York bond (Use the U.S. tax rate schedule Required: a. If Campbell earns an additional $15,000 of taxable income, what is her marginal tax rate on this income? b. What is her marginal rate if, instead, she had $15,000 of additional deductions? (For all requirements, do not round intermediate calculations.) Marginal tax rate Marginal tax rate b. Schedule x Single Schedule 2 Head of Household Ir table but not at The taxe Ir table con Beatment 105 of table income 5 13550 105 of income 5 2.700 S 39,475 5 9 ,700 SO 5 52.550 51.355 plus 12% of 5970 plus 12% of the excess over 59.700 $13.50 5 075 5340300 SE543 plus 225 of 56,065 plus 225 of STS 552.650 5 54.200 $160.725 SS200 S160700 $14.352 50 plus 245 of the excess over $54,200 $12.962 plus 245 of the excess or 534200 S160.725 5204,100 S160,700 5204.100 532.745 50 plus 325 of the excess over 51607 S31.322 plus 325 of the excess over S160.00 S204.100 SS10.100 S204.100 5510,300 46,625 50 plus 35% of the c over 204,100 S45.210 plus 35% of the excess over 204,100 S510.00 S510300 S153.795 50 plus 37 of the excess or S510.00 S152.350 plus 375 of the excess over S510,300 Schedule Y-2 Married Filing Separately Schedule Y 1 Married Piling Jolutly or Quality lug Widower) If taxable income But not over: The tax is: Ir taxable income is But not over The taxi S 19.00 10% of taxable income $ 9,700 107 of taxable income 57.950 $ 39,475 SI 940 plus 12 of the excess over S19.400 5970 plus 126 of the s over .700 SIG 100 59475 S54200 5453 plus 228 of 59.006 plus 226 of the er 573 950 539,475 S160.00 21450 525.765 plus 248 of S5200 S160.735 514.332 50 plus 245 S168.000 S020 565.1973 of S160725 5204.100 532.745 50 plus 329 of the excess over $160,725 5321.450 S400.350 5612.350 5204,100 S306.175 593.257 plus 355 of the excess over S403.250 546,628 50 plus 35% of the excess over 04100 $164,709 50 plus 375 5306 175 562.354 75 plus 375 Sh 150