Meiji Isetan Corp. of Japan has two regional divisions with headquarters in Osaka and Yokohama. Selected data on the two divisions follow: Division
Osaka Yokohama
Sales $9,900,000    $29,000,000   
Net operating income $792,000    $2,900,000   
Average operating assets $2,475,000    $14,500,000

Required:
a. For each division, compute the return on investment (ROI) in terms of margin and turnover.
b. Assume that the company evaluates performance using residual income and that the minimum required rate of return for any division is 17%. Compute the residual income for each division.