Wildhorse Co. purchased a new machine on October 1, 2017, at a cost of $90,000. The company estimated that the machine has a salvage value of $9,280. The machine is expected to be used for 72,900 working hours during its 8-year life. Compute the depreciation expense under the straight-line method for 2017 and 2018, assuming a December 31 year-end. (Round answers to 0 decimal places, e.g. 5,275.)