Current Attempt in Progress For its three investment centers, Sheffield Company accumulates the following data Sales $2,200,000 $4,400,000 $4,400,000 Controllable margin 1,430,000 2.024,000 3,740,000 Average operating assets 5,500,000 8,800,000 11,000,000 Compute the return on investment (ROI) for each center. Return on investment