Differential Analysis for a Lease or Sell Decision Granite Construction Company is considering selling excess machinery with a book value of $278,400 (original cost of $398,800 less accumulated depreciation of $120,400) for $277,400, less a 5% brokerage commission. Alternatively, the machinery can be leased for a total of $285,800 for five years, after which it is expected to have no residual value. During the period of the lease, Granite Construction Company's costs of repairs, insurance, and property tax expenses are expected to be $25,200. a. Prepare a differential analysis, dated November 7 to determine whether Granite should lease (Alternative 1) or sell (Alternative 2) the machinery Differential Analysis Lease Machinery (Alt. 1) or Sell Machinery (Alt. 2) November 7 Leace Machinery (Alternative 1) Sell Machinery (Alternative 2) Differential Effect on Income (Alternative 2) Revenues Costs Income (Loss) b. On the basis of the data presented, would it be advisable to leave or sell the machinery