Whispering Winds Corp. purchases a patent for $504,000 on January 2, 2019. Its estimated useful life is 18 years. 7a Prepare the journal entry to record amortization expense for the first year. (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.) Account Titles and Explanation Debit Credit