Revision of Depreciation

Equipment with a cost of $949,200 has an estimated residual value of $109,200, has an estimated useful life of 30 years, and is depreciated by the straight-line method.

a. Determine the amount of the annual depreciation. $_

b. Determine the book value after 17 full years of use. $_

c. Assuming that at the start of the year 18 the remaining life is estimated to be 21 years and the residual value is estimated to be $88,900, determine the depreciation expense for each of the remaining 21 years. $_