13. On January 1, 2017, Bailey Company purchased a machine for $106,000 that was expected to last five years and has a residual value of $6,000. At the beginning of 2020, Bailey decided that the machine's estimated useful life should be revised to a total of 6 years instead of 5. Also, the residual value was now estimated to be $5,500. Straight-line depreciation was used. Calculate the depreciation expense for 2020. 10