Crestview Estates purchased a tractor on January 1, 2018, for $65,000. The tractor’s useful life is estimated to be 30,000 miles and has a residual…

Crestview Estates purchased a tractor on January 1, 2018, for $65,000. The tractor’s useful life is estimated to be 30,000 miles and has a residual value of $5,000. If Crestview used the tractor 10,000 miles in 2018, what is the depreciation expense at the end of 2018 using the activity-based method?