Answer

Final answer:

The ROI for Osaka Division and Yokohama division are $21\%$ and $18\%$ respectively. In terms of margin and turnover, Osaka has a $7\%$ margin and $3$ turnover, whereas Yokohama has an $8\%$ margin and $2\mathrm{.}25$ turnover. Residual income for Osaka is $$30,000$ and for Yokohama is $$120,000.$