Gandolfi Construction Co. purchased a used CAT 336DL earth mover at a cost of $505,000 in January 2016. The company's estimated useful life of this heavy equipment is 10 years, and the estimated salvage value is $93,000. Assume that Gandolfi Construction Co. calculated depreciation expense for the CAT 336DL earth mover on the straight-Ine method and reported $00,600 of net income for the year ended December 31, 2016. The company's average total assets for 2016 were $3,900,000. Required: a. Calculate Gandolfi's ROI for the year ended December 31, 2016. Return On Investment for the year ended December 31, 2016 Choose Denominator: Choose Numerator: ROI ROI what Gandolfi's ROI would have been for the year ended December 31, 2016, had the company used the double-decining-balance depreciation method for the CAT 306DLearth b. Calculate mover. Return On Investment for the year ended December 31, 2016 /Choose Denominator ROI RO Choose Numerator