For its three investment centers, Vaughn Company accumulates the following data: I II III Sales $1,910,000 $3,919,000 $3,905,000 Controllable margin 1,337,000 1,959,500 3,514,500 Average operating assets 5,041,000 7,937,000 12,114,000 The centers expect the following changes in the next year: (1) Increase sales 12%: (11) decrease costs $431,000; (III) decrease average operating assets $21,000. Compute the expected return on investment (ROI) for each center. Assume center I has a controllable margin percentage of 70%. (Round ROT to 1 decimal place, e.g. 1.5%.) 1 II III The expected return on investment % %6