21 what is the answer?

Augie Corporation purchased a truck at a cost of $68,400 ft has an estimated useful life of five years and estimated residual value of $6,400. At the Beginning of year three. Angle's managers concluded mat the total useful life would be four years, rather then five years. There was no change in the estimated residual value. What is the amount of depreciation that Augie should record for year 3 under the straight-line depreciation method