Chuck, a single taxpayer, earns $84,500 in taxable income and $23,000 in interest from an investment in City of Heflin bonds. a) if Chuck earns an additional $56,000 of taxable income, what is his marginal tax rate on this income?

b) what is his marginal tax rate if, instead, he had $56,000 of additional deductions?

use the U.S. tax rate schedules.

show detail please