2. (Profitability ratios) A financial analyst calculated the following ratios from a firm's income statement: Gross profit margin = 60% Operating profit margin = 27% Pre-tax profit margin = 14% The firm had sales of $500,000 and paid federal in- come taxes at a 35% rate. a. Reproduce the firm's income statement. b. Calculate the firm's net profit margin ratio. 3. (Rates of rot