y Home work Question 5 of 5 < Current Attempt in Progress Presented below is selected information for three regional divisions of Medina Company. Divisions North West South Contribution margin $299,000 $499,100 $400,800 Controllable margin $139,500 $361,100 $208,500 Average operating assets $930,000 $1,570,000 $1,390,000 Minimum rate of return 13 % 14 % 8 % (a)