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	$	18,600,000
Net operating income	$	4,900,000
Average operating assets	$	36,500,000

Required:

1. Compute the margin. (Round your answer to 2 decimal places.)

2. Compute the turnover. (Round your answer to 2 decimal places.)

3. Compute the return on investment (ROI). (Round your intermediate calculations and final answer to 2 decimal places.)