You are given the following information for Smashville, Inc. Cost of goods sold: Investment income: Net sales: Operating expense: Interest expense: Dividends: Tax rate: $249,000 $2,900 $394,000 $92,000 $7,400 $13,000 21% Current liabilities: Cash: Long-term debt: Other assets: Fixed assets: Other liabilities: Investments: Operating assets: $22,000 $21,000 $9,000 $37,000 $139,000 $5,000 $13,000 $49,000 Calculate the gross margin, the operating margin, return on assets, and return on equity. (Do not round intermediate calculations. Enter your answers as a percent rounded to 2 decimal places.) % % Gross margin Operating margin Return on assets Return on equity % %