On January 2, 2013 Dyson purchased a utility patent for a new consumer product and paid $180,000. At the time of purchase the patent was valid for 15 years. However the patents useful life was estimated to be only 10 years due to the competitive nature of the product with no residual value. On December 31, 2016, the product was permanently withdrawn from sale under government order because of a potential health hazard. Thus no future positive cash flows will result from use of the patent and its fair value is zero. What amount should Dyson charge against income in 2016 assuming straight-line amortization is appropriately recorded at the end of each year