During 2013, Sheffield Corporation spent $167,040 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, 2013, and had a legal life of 20 years and a useful life of 10 years. Legal costs of $41,040 related to the patent were incurred as of October 1, 2013. Prepare all journal entries required in 2013 and 2014 as a result of the transactions above. (Round answers to 0 decimal places, e.g. 8,564. 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 0 for the amounts.) Date Account Titles and Explanation 2013 Debit Credit To record research and development expenses) 2013 To record legal expenses) 2013 To record amortization expense) 2014 On June 1, 2015, Sheffield spent $31,680 to successfully prosecute a patent infringement suit. As a result, the estimate of useful life was extended to 12 years from June 1, 2015. Prepare all journal entries required in 2015 and 2016. (Round answers to 0 decimal places, e.g. 8,564. 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 0 for the amounts. Date Account Titles and Explanation Debit Credit 2015 (To record patents) 2015 (To record amortization expense) 2016 In 2017, Sheffield determined that a competitor's product would make the New Age Plano obsolete and the patent worthless by December 31, 2018. Prepare all journal entries required in 2017 and 2018. (Round answers to o decimal places, e.g. 8,564. 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 0 for the amounts.) Account Titles and Explanation Debit Credit