A company purchases a packing machine for £39,000 on over 1 January Year 1. The company expects to use the machine for three years after which it will be sold for an estimated £3,000. The company uses the straight-line method of depreciation. Calculate the annual depreciation charge that will be shown in the income statement and the net book value that will be shown on the balance sheet as at 31 December at the end of each of the three years. Assume that the machine is still shown on the balance sheet as at 31 December Year 3, before it is finally sold early in Year 4.