Problem #5 On May 1, 2013 Shirley's Skinsaver, Inc. paid $208,800 for a patented secret formula restorative face cream called "Fountain of Youth in a bottle". Professor Weinstein, an avid user of the product proclaimed "I don't look a day over 95 and I'm ready for my GQ photo shoot". As a result of the "human" trials and market research it was believed that the patent would be economically viable for a period of 12 years. On December 31, 2016 Shirley paid $144,000 in legal fees relative to the successful defense of the patent vs.a competitor, Claribel AirBrush Inc., which marketed a product known as "Nueva Cara" that was demonstrated to be a cheap imitation of Fountain of Youth in a bottle. As of January 1, 2019 Billy Toobooks, controller of Shirley's Skinsaver, Inc. revised the estimate of the remaining useful life of the Patent to 4 years. On January 2, 2020 Shirley paid $92,000 in legal fees relative to the unsuccessful defense on the patent. Required: a Amortization expense for 2013 b Carrying value (unamortized cost) as of Dec. 31, 2016 c Amortization expense for 2017 d Carrying value as of Dec. 31, 2018 e Amortization expense for 2019 f Carrying value as of Dec. 31, 2020