EXERCISE 11-1 Compute the Return on Investment (ROI) [LO11-1] 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 $7,500,000 $600,000 $5,000,000 Q/calculate materials price and quantity variances? EXERCISE 11-1 Compute the Return on Investment (ROI) [LO11-1] 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 $7,500,000 $600,000 $5,000,000 Q/calculate materials price and quantity variances