Gaub Corp. purchased a machine at a total cost of $400,000. As the account for the company, you estimated useful life of 7 years or 25,000 hours of operation, with a salvage value of $50.000. The president of the company wants to know what impact this capital expenditure will have on income over the next 7 years. (Assume the machine is used 4,000 hours in the first year of operation and that its usage increases 10% in each succeeding year.) Prepare a schedule showing the depreciation expense and year-ending carrying value of the asset for each of the next four years under each of the following methods of depreciation: 1. Straight-line method 2. Units-of-production method 3. Double-declining balance method