HELP! ASAP PLEASE. i keep getting these wrong

Alyeska Services Company, a division of a major oil company, provides various services to the operators of the North Slope oil field in Alaska. Data concerning the most recent year appear below: Sales $ 18, 500, 000 Net operating income $ 4,500, 000 Average operating assets $ 36, 000 , 000 Required: 1. Compute the margin for Alyeska Services Company. (Round your answer to 2 decimal places.) 2. Compute the turnover for Alyeska Services Company. (Round your answer to 2 decimal places.) 3. Compute the return on investment (ROI) for Alyeska Services Company. (Round your intermediate calculations and final answer to 2 decimal places.) 1. Margin 0.24 % 2. Turnover 18,500,000.00 3. ROI 0.51 %