(Related to Checkpoint 4.3) (Profitability analysis) Last year the P. M. Postem Corporation had sales of $425,000, with a cost of goods sold of $113,000. The firm's operating expenses were $130,000, and its increase in retained earnings was $82,880. There are currently 22,000 shares of common stock outstanding, the firm pays a $1.61 dividend per share, and the firm has no interest-bearing debt. a. Assuming the firm's earnings are taxed at 35 percent, construct the firm's income statement. b. Compute the firm's operating profit margin