Depreciation Methods A machine costing $180.000 was purchased May 1. The machine should be obsolete after four years and therefore, no longer useful to the company. The estimated salvage value is $15,000 Calculate the depreciation expense for each year of is expected us i ng each of the following depreciation methods: (a) straight-line, double dening balance. For double declining balance, do not round until your final e Round your final anwers to the nearest dollar Check