In January, 2015, Tillicum Corp. purchased a patent for a new consumer product for $ 900,000. At the time of purchase, the patent was valid for 15 years. Due to the competitive nature of the product, however, the patent was estimated to have a useful life of only ten years. During 2020, the product was permanently removed from the market because of a potential health hazard. What amount should Twicum recognize as an impairment loss for calendar 2020, assuming amortization has been recorded annually using the straight-line method with no residual value? A) $ 600,000 B) $ 90,000 OC) $ 450,000 OD) $ 60,000