Covershot Company purchased plastic laminating equipment on July

Covershot Company purchased plastic laminating equipment on July 1, 2006, for $7,830.
The equipment was expected to have a useful life of three years, or 10,040 operating hours, and a residual value of $300. The equipment was used for 1,600 hours during 2006, 3,800 hours in 2007, 3,400 hours in 2008, and 1,240 hours in 2009.

Instructions
Determine the amount of depreciation expense for the years ended December 31, 2006, 2007, 2008, and 2009, by
(a) The straight-line method,
(b) The units-of-production method, and
(c) The double-declining-balance method. Round to the nearest dollar.