How would I go about solving something like this?

The following is divisional information for Kingfisher Enterprises: East Division West Division Operating income $250.000 $200,000 Net sales 2.225,000 1,575.000 Total assets at Jan. 1 1,500,000 840.000 Total assets at Dec 1,200,000 1,000,000 31 The target rate of return is 12% for the East Division and is 10% for the West Division. Required For each division, compute the following: 1. Profit margin 2. Investment Turnover 3. Return on Investment 4. Residual Income