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 Net operating income Average operating assets Required: 1. Compute the margin. 2. Compute the turnover. $ 7,500,000 $ 600,000 $ 5,000,000 Note: Round your answer to 1 decimal place. 3. Compute the return on investment (ROI). Note: Do not round intermediate calculations.