Machinery is purchased on July 1 of the current fiscal year for $240,000. It is expected to have a useful life of 4 years, or 25,000 hours of operation, and a salvage value of $15,000. Calculate the depreciation for the last six months of the current fiscal year ending December 31, and the total depreciation of the following year by each of the following methods: (15 points)

(a)	straight line
(b)	declining balance at twice the linear rate
(C)	production units (used for 1,600 hours during the current year, 1,800 hours the following year)

(Round your answer to the nearest dollar)