Use the following data from a firm's pro forma (i.e., projected or forecasted) financial statements to calculate the following profitability ratios for the firm, assuming that all stocks are common stocks: (a) net profit margin; (b) return on total assets; (c) return on equity; (d) price-earnings ratio.

           Sales                 $150 million

          Net income              12 million

          Total Assets           600 million    

          Stockholders' Equity   200 million

          Number of Common Stock Shares    4 million

          Price per share of common stock $50.00