Chuck, a single taxpayer, earns $77,750 in taxable income and $29,250 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.)

"MUST USE 2015 TAX RATE SCHEDULE"

A) If Chuck earns an additional $57,250 of taxable income, what is his marginal tax rate on this income?

B) What is his marginal rate if, instead, he had $57,250 of additional deductions?

PLEASE DON'T FORGET TO USE 2015 TAX RATE !!!!!!!