Morris Corporation has the following information on its balance sheets: Cash = $40, accounts receivable = $30, inventories = $100, net fixed assets = $500, accounts payable = $20, accruals = $10, short-term debt (matures in less than a year) = $25, long-term debt = $200, and total common equity = $415. Its income statement reports: Sales = $820, costs of goods sold (excluding depreciation) = $450, depreciation = $50, interest expense = $20, and tax rate = 40%. Calculate the following ratios: Net profit margin , operating profit margin , basic earning power ratio and return on total assets and return on common equity