Bergstrom Corporation purchased a truck at a cost of $60,000. It has an estimated useful life of six years and estimated residual value of $6,000. At the beginning of year three, Bergstrom's managers concluded that the total useful life would be four years, rather than six. There was no change in the estimated residual value. What is the amount of amortization that Bergstrom should record for year 3 under the straight-line method? Multiple Choice None of the other alternatives are correct $8,250 O $18,000 O O $11,000 O $15,500