Data follow for the Construction Division of D. Jack Inc>:

Year 1 Year 2

Sales $148,500,000 $162,250,000

Operating Income $8,910,000 $8,112,500

Average operating assets $337,500,000 $405,625,000

1: Compute the margin and turnover ratios for each year.

2: Compute the ROI for the Construction Division for each year.