Revision of Depreciation Equipment with a cost of $392,700 has an estimated residual value of $35,700, has an estimated useful life of 15 years, and is depreciated by the straight-line method. a. Determine the amount of the annual depreciation. 23,800 V b. Determine the book value after 9 full years of use. $178,500 V c. Assuming that at the start of the year 10 the remaining life is estimated to be 13 years and the residual value is estimated to be $34,200, determine the depreciation expense for each of the remaining 13 years. $10,984.6 X