B acquired a lorry on 1 May 20X0 at a cost of $30,000. The lorry has an estimated useful life of four years, and an estimated resale value at the end of that time of $6,000. B charges depreciation on the straight line basis, with a proportionate charge in the period of acquisition.What will the depreciation charge for the lorry be in B's accounting period to 30 September 20X0?