During 2016, Cheyenne Corporation spent $149,760 in research and development costs. As a result, a new product called the New Age Piano was patented. The patent was obtained on October 1, 2016, and had a legal life of 20 years and a useful life of 10 years. Legal costs of $23,760 related to the patent were incurred as of October 1, 2016. Prepare all journal entries required in 2016 and 2017 as a result of the transactions above. (Credit account titles are automatically indented when amount is entered. Do not indent manually. If no entry is required, select "No Entry" for the account titles and enter O for the amounts.) Date Account Titles and Explanation 2016 Debit Credit 2016 (To record research and development expenses) 2016 (To record legal expenses) 2017 (To record amortization expense) eTextbook and Media List of Accounts On June 1, 2018, Cheyenne spent $9,000 to successfully prosecute a patent infringement suit. As a result, the estimate of useful life was extended to 12 years from June 1, 2018. Prepare all journal entries required in 2018 and 2019. (Credit account titles are automatically indented when amount is entered. Do not indent manually. If no entry is required, select "No Entry" for the account titles and enter O for the amounts.) Date Account Titles and Explanation 2018 2018 (To record patents) 2019 (To record amortization expense) eTextbook and Media List of Accounts Debit Credit In 2020, Cheyenne determined that a competitor's product would make the New Age Piano obsolete and the patent worthless by December 31, 2021. Prepare all journal entries required in 2020 and 2021. (Credit account titles are automatically indented when amount is entered. Do not indent manually. If no entry is required, select "No Entry" for the account titles and enter O for the amounts.) Date Account Titles and Explanation 2020 & 2021 Debit Credit