In January, 2016, Pharoah Corporation purchased a patent for a new consumer product for $936000. 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 10 years. During 2021 the product was determined to be obsolete due to a competitors new product. What amount should Pharoah charge to expense during 2021, assuming amortization is recorded at the end of each year