Sketches Inc. purchased a machine on January 1, 2016. The cost of the machine was $20,000. Its estimated residual value was $6,000 at the end of an estimated 5-year life. The company expects to produce a total of 20,000 units. The company produced 800 units in 2016 and 1,250 units in 2017, Required: Calculate depreciation expense for 2016 through 2020 using the double-declining balance method. (Round your final answer to nearest dollar value.) 2016 2017 2018 2019 2020 Depreciation Expense