please help

In January 2021, Sunland Corporation purchased a patent for a new consumer product for $942000. 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. In 2026, the product was determined to be obsolete due to a competitors new product. What amount should Sunland charge to expense for the patent during 2026, assuming straight-line amortization is recorded at the end of each year? $94200. $471000. $628000. $62800