Question: ROI performance measures based on historical cost and current cost. Nature's Juice Corporation operates three divisions that process and bottle natural fruit juices. The historical-cost accounting system reports the following information for 2017:

Nature's Juice estimates the useful life  of each plant to be 12 years, with no terminal disposal value. The  straight-line depreciation method is used. At the end of 2017, the  passion fruit plant is 10 years old, the kiwi fruit plant is 3 years  old, and the mango fruit plant is 1 year old. An index of construction  costs over the 10-year period that Nature's Juice has been operating  (2007 year@end = 100) is as follows:
2007         2014           2016            2017
100           120             185              200
Given  the high turnover of current assets, management believes that the  historical-cost and current-cost measures of current assets are  approximately the same.
1.  Compute the ROI ratio (operating income to total assets) of each  division using historical-cost measures. Comment on the results.
2.  Use the approach in Exhibit to compute the ROI of each division,  incorporating current cost estimates as of 2017 for depreciation expense  and long-term assets. Comment on the results.
3.  What advantages might arise from using current-cost asset measures as  compared with historical cost measures for evaluating the performance of  the managers of the three divisions?