A New York Yankees purchased a work truck for $21,000 on 1/1. The truck is expected to have a 4 year life and last 100,000 miles with a salvage (residual) value of $9,000. The truck was driven 25,000 miles in year 1. If the New York Yankees use the activity based method to calculate depreciation expense, how much would the depreciation expense be for the first year of use?