You are given the following information for Smashville, Inc. Cost of goods sold: Investment income: Net sales: Operating expense: Interest expense: Dividends: Tax rate: $119,000 $2,300 $232,000 $ 40,000 $ 7,400 11,000 40% Current liabilities: Cash: Long-term debt: Other assets: Fixed assets: Other liabilities: Investments: Operating assets: $ 18,000 21,000 $25,000 $39,000 $126,000 $ 5,000 43,000 45,000 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