On January 1, 2001, Chertco acquired a patent for $500,000 and using the straight-line method began amortizing it properly over its estimated useful life of 10 years. The asset has no residual value. At December 31, 2004, a significant change in the business climate caused Chertco to assess the recoverability of the carrying amount of the patent. Chertco estimated that the undiscounted future net cash inflows from the patent would be $325,000 and that its fair value is $275,000. Accordingly, for the year ended December 31, 2004, what Chertco should recognize an impairment loss of ?