4 Gray Ltd purchased a machine on 1 April 20X2 for GHS 16,000. In the years ended 31 March 20x3 and 31 March 20X4, Gray Ltd depreciated the machine at 25% per annum on a straight-line basis. On April 20X4, the machine was revalued to GHS 12,000 with its estimated useful life being unchanged. In accordance with IAS 16 Property, Plant and Equipment, what was the effect of this revaluation on Gray Ltd's profit for the year ended 31 March 20X5? A B An increase of GHS 1,000 An increase of GHS 2,000 A decrease of GHS 1,000 A decrease of GHS 2,000 D