A building that was purchased December 31, 1991, for

£2,500,000 was originally estimated to have a life of 50 years with no residual value at the end of that time. Depreciation has been recorded through 2015. During 2016, an examination of the building by an engineering firm discloses that its estimated useful life is 15 years after 2015. What should be the amount of depreciation for 2016?