Required information Exercise 6-16A Calculate levels of profitability for a multiple-step income statement and the gross profit ratio (LO6-2, 6-7) [The following information applies to the questions displayed below.] Below are amounts found in the income statements of three companies. Exercise 6-16A Part 1 Required: 1. For each company, calculate (a) gross profit, (b) operating income, (c) income before income taxes, and (d) net income. (Negative amounts should be indicated by a minus sign.) 2-a. For each company, calculate the gross profit ratio