Equipment purchased at the beginning of the fiscal year for $280,000 is expected to have a useful life of 5 years, or 12,000 operating hours, and a residual value of $40,000. Compute the depreciation for the first year of use by each of the following methods:

(a) straight-line

(b) units-of-production (1,300 hours first year)

(c) double-declining-balance