Revision of Depreciation Equipment with a cost of $503,400 has an estimated residual value of $45,800, has an estimated useful life of 32 years, and is depreciated by the straight-line method. a. Determine the amount of the annual depreciation. b. Determine the boiok value after- 14 full years of use. C. Assuming that at the start of the year 15 the remaining life is estimated to be 22 years and the residual value is estimated to be 545,800 , determine the depreciation expense for each of the remaining 22 years