Grouper Magazine sold 12,240 annual subscriptions on August 1, 2020, for $15 each. Prepare Grouper's August 1, 2020, journal entry and the December 31, 2020, annual adjusting entry, assuming the magazines are published and delivered monthly. (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. Record journal entries in the order presented in the problem.) Date Account Titles and Explanation 8/1/20 Cash Unearned Sales Revenue 12/31/20 Unearned Sales Revenue Sales Revenue Debit 413280 172000 Credit 413280 172000