On January 24, Bora Co. purchased a delivery van for $22,000. Bora expects to drive the van for approximately 5 years or 100,000 miles, before disposing of it for an estimated salvage value of $2,000. During the first year, Bora drives the van for 18,000 miles. How much would depreciation expense be if Bora uses the units-of-production depreciation method?