(Profitability analysis)Last year the P. M. Postem Corporation had sales of $427,000, with a cost of goods sold of $114,000. The firm's operating expenses were $128,000, and its increase in retained earnings was $86,020. There are currently 21,000 shares of common stock outstanding, the firm pays a $1.63 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.