You are given the following information for Smashville, Inc. Cost of goods sold: Investment income: Net sales: Operating expense: Interest expense: Dividends: Tax rate: $170,000 $3,200 $308,000 $49,000 $7,400 $14,000 21% Current liabilities: Cash: Long-term debt: Other assets: Fixed assets: Other liabilities: Investments: Operating assets: $24,000 $21,000 $6,000 $40,000 $162,000 $5,000 $16,000 $51,000 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.) 44.81% 29.90 % Gross margin Operating margin Return on assets Return on equity 17.54% 19.95%