Millar, Inc., purchased a truck to use for deliveries and is attempting to determine how much depreciation expense would be recognized under three different methods. The truck cost $20,000 and is expected to have a value of $4,000 at the end of its five-year life. The truck is expected to be used at the rate of 10,000 miles in the first year, 20,000 miles in the second and third years, and 15,000 miles in the fourth and fifth years.