You are given the following information for Smashville, Inc. Cost of goods sold: Investment income: Net sales: Operating expense: Interest expense: Dividends: Tax rate: $184,000 $1,600 $387,000 $88,000 $7,400 $6,000 21% Current liabilities: Cash: Long-term debt: Other assets: Fixed assets: Other liabilities: Investments: Operating assets: $12,000 $21,000 $32,000 $40,000 $125,000 $5,000 $36,000 $64,000 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 % %