Units-of-Production Method A light truck is purchased on January 1 at a cost of $35,180. It is expected to serve for five years and have a salvage value of $1,300. It is expected to be used for 121,000 miles over its five-year useful life. Using the units-of-production method, calculate the depreciation expense for the first and third years of use if the truck is driven 18,000 miles in year 1 and 22,300 miles in year 3. Depreciation Expense Year 1 Year 3 $