The financial statements for Castile Products, Inc., are given below: Castile Products, Inc. Balance Sheet December 31 Assets Current assets: Cash $ 23,000 Accounts receivable, net 190,000 Merchandise inventory 380,000 Prepaid expenses 8,000 Total current assets 601,000 Property and equipment, net 890,000 Total assets $ 1,491,000 Liabilities and Stockholders' Equity Liabilities: Current liabilities $ 280,000 Bonds payable, 8% 330,000 Total liabilities 610,000 Stockholders equity: Common stock, $5 par value $ 140,000 Retained earnings 741,000 Total stockholders equity 881,000 Total liabilities and stockholders' equity $ 1,491,000 Castile Products, Inc. Income Statement For the Year Ended December 31 Sales $ 2,150,000 Cost of goods sold 1,240,000 Gross margin 910,000 Selling and administrative expenses 620,000 Net operating income 290,000 Interest expense 26,400 Net income before taxes 263,600 Income taxes (30%) 79,080 Net income $ 184,520 Account balances at the beginning of the year were: accounts receivable, $210,000; and inventory, $350,000. All sales were on account. Assets at the beginning of the year totaled $1,040,000, and the stockholders equity totaled $685,000. Required: Compute the following:

1. Gross margin percentage. (Round your percentage answer to 2 decimal places (i.e., 0.1234 should be entered as 12.34).)

2. Net profit margin percentage. (Round your answer to the nearest whole percentage place (i.e., 0.1234 should be entered as 12%).)

3. Return on total assets. (Round your percentage answer to 1 decimal place (i.e., 0.1234 should be entered as 12.3).)

4. Return on equity. (Round your percentage answer to 1 decimal place (i.e., 0.1234 should be entered as 12.3).)