The following are selected 2020 transactions of Windsor Company. Jan. 1 Purchased a small company and recorded goodwill of $199,000. Its useful life is indefinite. Purchased for $135,000 a patent with an estimated useful life of 6 years and a legal life of 18 years. May 1 Prepare necessary adjusting entries at December 31 to record amortization required by the events above. (If no entry is required, select "No entry" for the account titles and enter O for the amounts. Credit account titles are automatically indented when amount is entered. Do not indent manually. Debit Date Account Titles and Explanation Credit Dec. 31 To record goodwill amortisation) Dec. 31 To record patent amortisation)