Can you help with this one along with an explanation?

Can you help with this one along with an explanation? I keep getting it wrong...

Schager Company purchased a computer system at a cost of $34,000. The estimated useful life is 6 years, and the estimated residual value is $5,000. Assuming the company will use the double-declining-balance method, what is the depreciation expense for the second year? (Do not round your intermediate calculations. Round your answer to the nearest whole dollar amount.)