Table 3.5 2015 Individual Tax Rates Single Individuals You Pay This Amount on the Base ofthe Bracket Plus This Percentage Avage Tax on the Excess over the If Your Taxable Income Is Up to S9,225 $9,225-$37,450 S37,450-$90,750 90,750-$189,750 S189,750-S411,500 S411,500-SS413,200 Over $413,200 Rate at Rate Top of Bracket 1 0.0% 15.0 25.0 28.0 33.0 35.0 39.6 10.0% 13.8 20.4 24.3 29.0 29.0 39.6 0 922.50 5,156.25 18,481.25 46,075.25 119,401.25 119,996.25 Married Couples Filing Joint Returns You Pay This Amount on the Base of the Bracket Plus This Percentage Avage Tax on the Excess over the If Your Taxable Income Is Up to $18,450 S18,450-$74,900 S74,900-S151,200 S151,200-$230,450 S230,450-$411,500 S411,500-$464,850 Over $464,850 Rate at Base (Marginal Rate Top of Bracket 10.0% 15.0 25.0 28.0 33.0 35.0 39.6 10.0% 13.8 19.4 22.4 27.1 28.0 39.6 0 1,845.00 10,312.50 29,387.50 51,577.50 111,324.00 129,996.50 Problem 3-08 Personal Taxes Susan and Stan Britton are a married couple who file a joint income tax return, where the tax rates are based on the tax table 3.5. Assume that their taxable income this year was $318,000. Round your answers to two decimal places a. What is their federal tax liability? b. What is their marginal tax rate? c. What is their average tax rate