A copy machine acquired with a cost of $3,000 has an estimated useful life of 5 years. It is also expected to have a useful operating life of 15,000 copies. Assuming that it will have a residual value of $200, determine the depreciation for the first year by the

(a)	straight-line method
(b)	double-declining-balance method
(c)	units-of-output method (3,500 copies were made the first year)