ABC Company on Jan 1, 2021 purchased a delivery van for $24,000. To complete the purchase, the company also incurred a $800 shipping cost and $1,200 sales tax. The company estimates that at the end of its four-year service life, the van will be worth $4,000. During the four-year period, the company expects to drive the van 100,000 miles. Actual miles driven each year were 20,000 miles in year 1; 25,000 miles in year 2; 44,000 miles in year 3; and 55,000 miles in year 4. Required: Using Straight-line depreciation method, what is the annual depreciation expense