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 40% 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