On July 1, 2020, Riverbed Co. pays $15,960 to Marin Insurance Co. for a 3-year insurance policy. Both companies have fiscal years ending December 31. Journalize the entry on July 1 and the adjusting entry on December 31 for Marin Insurance Co. Marin uses the accounts Unearned Service Revenue and Service Revenue. (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. Record journal entries in the order presented in the problem.)