Selected comparative statement data for Isabel Wedding Consultant are presented below. All balance sheet data are as of December 31.

Compute the following ratios for 2008:
(a) Profit margin
(b) Asset turnover
(c) Return on assets
(d) Return on common stockholders’equity

2008 800,000 480,000 $720,000 440,000 5,000 Net sales Cost of goods sold Interest expense Net income Accounts receivable Inventory Total assets Total common stockholders' equity 7.000 60,000 120,000 85,000 580,000 430,000 100,000 75,000 500,000 325,000