please and help. thank you!

23-23 ROI, RI, measurement of assets. (CMA, adapted) Carter Corporation recently announced a bonus plan to be awarded to the manager of the most profitable division. The three division managers are to choose whether ROI or RI will be used to measure profitability. In addition, they must decide whether invest- ment will be measured using gross book value or net book value of assets. Carter defines income as operat- ing income and investment as total assets. The following information is available for the year just ended: Division Gross Book Value of Assets Accumulated Depreciation Operating Income Radnor $1,200,000 $645,000 $142,050 Easttown 1,140,000 615,000 137,550 Marion 750,000 420,000 92, 100 Carter uses a required rate of return of 10% on investment to calculate RI