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Cosby Company purchased a new plant asset on April 1, 2015, at a cost of 774,000 It was estimated to have a service lift of 20 years and a residual value of 60,000 Cosby's accounting period is the calendar year. Compute the depreciation for this asset for 2015 and 2016 using the sum-of-the-years'-digits method. Compute the depreciation for this asset for 2015 and 2016 using the double-declining-balance method