Calculate depreciation under alternative methods. (LO 2)

Brother's Helper Manufacturing bought a machine for \(\$ 172,000\) cash at the beginning of 2007. The estimated useful life is 8 years and the estimated salvage value is \(\$ 4,000\). The estimated productivity is 265,000 units. Units actually produced were 92,750 in 2007 and 55,650 in 2008. Calculate the depreciation expense for 2007 and 2008 under each of the three methods given. (Round your answers to the nearest dollar.)

a. Straight-line method

b. Activity method

c. Double-declining balance method