Exercise 24-20 Presented below is selected information for three regional divisions of Medina Company North $299,600 West South Contribution margin Controllable margin Average operating assets Minimum rate of retum $399,300 $140,300 $360,300 $209,000 $935,333 $2,001,667 $1,393,333 11% 14% 9 96 Compute the return on investment for each division. (Round ROI to 0 decimal places, e-g. 15.) North Division West Division South Division Compute the residual income for each division. (Round final answers to 0 decimal places, e.g. 1,255.) North Division West Division South Division