The intangible assets section of Pronghorn Corporation's balance sheet at December 31, 2017, is presented here.

Patents ($87,700cost less $8,770amortization)$78,930

Copyrights ($66,000cost less $46,200amortization)19,800

Total$98,730

The patent was acquired in January 2017 and has a useful life of 10 years. The copyright was acquired in January 2011 and also has a useful life of 10 years. The following cash transactions may have affected intangible assets during 2018.

Jan.2Paid $63,000legal costs to successfully defend the patent against infringement by another company.Jan.-JuneDeveloped a new product, incurring $248,000in research and development costs. A patent was granted for the product on July 1, and its useful life is equal to its legal life. Legal and other costs for the patent were $40,000.Sept.1Paid $52,000to a quarterback to appear in commercials advertising the company's products. The commercials will air in September and October.Oct.1Acquired a copyright for $285,000. The copyright has a useful life and legal life of 50 years.

Prepare journal entries to record the 2018 amortization expense for intangible assets.