These are selected 2017 transactions for Flint Corporation: Jan. 1 Purchased a copyright for $132,300. The copyright has a useful life of 7 years and a remaining legal life of 32 years. Mar. 1 Purchased a patent with an estimated useful life of 4 years and a legal life of 25 years for $62,160. Sept. 1 Purchased a small company and recorded goodwill of $150,950. Its useful life is indefinite. Indicate the amount of amortization expense on December 31, 2017, for Flint Corporation Amortization expense $