Revision of Deprecation A buibding with a cost of $843,750 has an estimated residuar vaiue of 5168,750 , has an estimated useful life of 27 years; and is depreciated by the stringht-line method a. What is the amount of the annual depreciation? Do not round intermediate colculations. b. What is the book value at the end of the nitteenth year of use? c. If at the start of the sateenth year it is estimated that the remaining life is 15 years and that the residual value is $33, 250, what is the depreciation expense for each of the remaining 15 years