Hatfield Company purchased a computer on January 1, 2013 for $10,000. The computer had an estimated salvage value of $3,000 and an estimated useful life of five years. At the beginning of 2015, the estimated salvage value changed to $1,000, and the computer is expected to have a remaining useful life of two years. The company always uses the straight-line method of depreciation. What is the depreciation expense for 2015?