On 1 January 20X1 Stockbridge Ltd purchased a machine for Pula 560,000. The residual value was estimated as Pula 80,000 and the useful life was expected to be 10 years Stockbridge Ltd depreciates plant on a straight-line basis. On 1 January 20X6 the machines remaining useful life was reassessed to be 4 years and the residual value was still considered to be Pula 80,000. What is the depreciation charge for the item of plant for the current year to 31 December 20X6?