I need help with the following problem.

Selected data from the Florida Fruit Company are presented below:

Total assets $1,500,000 Average total assets 1,850,000 Net income 175,000
Net sales 1,300,000
Average common stockholders' equity 1,000,000
Net cash provided by operating activities 275,000

Instructions:

Assuming that no dividends were declared or paid during the period, find out the following profitability ratios from the above information:

1. Profit margin

2. Asset turnover

3. Return on assets

4. Return on common stockholders' equity