The depreciation expense is calculated from a plant used in treating sewage So SW company does not have any depreciable assets other than the plant The plant was purchased at the beginning of the fiscal year 2007 The cost of the plant was 200 000 Also an operation manager estimates its useful life as 10 years The plant falls in 20 year 150 class in MACRS for the tax purpose Assume that this property class requires half year convention If necessary refer the corporate income tax s