103 5. Calculating Taxes. The SGS Co. had $243,000 in taxable income. Using the rates from Table 2.3 in the chapter, calculate the company's income taxes. 6. Tax Rates. In Problem 5, what is the average tax rate? What is the marginal tax rate? LO 3 103 5. Calculating Taxes. The SGS Co. had $243,000 in taxable income. Using the rates from Table 2.3 in the chapter, calculate the company's income taxes. 6. Tax Rates. In Problem 5, what is the average tax rate? What is the marginal tax rate? LO 3