Federal Income Tax

Tax Rates. Based on the amounts of taxable income below, compute the federal income tax payable in 2013 on each amount assuming the taxpayer is married filing a joint return. Also, for each amount of taxable income, compute the acerage tax rate and marginal tax rate.
a. Taxable income of $30,000
b. Taxable income of $100,000
c. Taxable income of $375,000
d. Taxable income of $600,000