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Compare ROl Using Net Book and Gross Book Values The Caribbean Division of Mega-Entertainment Corporation just started operations. It purchased depreciable assets costing $24 million and having a 4-year expected life, after which the assets can be salvaged for $4.8 million. In addition, the division has $24 million in assets that are not depreciable. After four years, the division will have $24 million available from these nondepreciable assets. This means that the division has invested $48 million in assets with a salvage value of $28.8 million. Annual depreciation is $4.8 million. Annual operating cash flows are $13 million. Depreciation is computed on a straight-line basis, recognizing the salvage values noted. Ignore taxes. Assume that the division uses beginning-of-year asset values in the denominator for computing ROI. Required: Compute ROI, using net book value and gross book value. (Round your answers to 1 decimal place.)