Brief Exercise 23-09 For its three investment centers, Marigold Company accumulates the following data: I II III Sales $2,062,000 $3,914,000 $3,905,000 Controllable margin 848,640 2,161,620 4,103,120 Average operating assets 4,992,000 8,006,000 12,068,000 Compute the return on investment (ROI) for each center.