Answer: See explanation
Step-by-step explanation:
1. The return on investment for Osaka will be:
= (816000/10200000) × (10200000 × 2550000)
= 32%
The return on investment for Yokohama will be:
= (3200000/32000000) × (32000000/16000000)
= 20%
2. See attachment
3. Yokohama’s greater amount of residual income is not an indication that it is better managed. Since Yokohama Division is bigger than Osaka Division, it's expected that Yokohama will have a greater residual amount.