Rottino Company purchased a new machine on October 1, 2015, at a cost of $121,100. The company estimated that the machine will have a salvage value...

Rottino Company purchased a new machine on October 1, 2015, at a cost of $121,100. The company estimated that the machine will have a salvage value of $14,600. The machine is expected to be used for 10,500 working hours during its 4-year life.

Compute the depreciation expense under units-of-activity for 2015, assuming machine usage was 1,800 hours.