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Ivanhoe Corporation purchased a patent for $138000 on September 1, 2024. It had a useful life of 10 years. On January 1. 2026. Ivanhoe spent $35000 to successfully defend the patent in a lawsuit. Ivanhoe feels that as of that date, the remaining usefullife is 5 years. What amount should be reported for patent amortization expense at the company's December 31,2026 year-end if the straight-line method is used? $30920. $29080. 531840 $23920