Given the tax rates shown in the table, what is the average tax rate for a firm with taxable income of $278,000? Taxable Income Tax Rate $0 - 50,000 15% $50,000 - $75,000 25% $75,000 - $100,000 34% $100,000 - $335,000 39% 37.20 percent 39.00 percent 29.15 percent 32.97 percent