Laker Incorporateds fiscal year-end is December 31, 2021. The following is an adjusted trial balance as of December 31. Accounts Debit Credit Cash $ 10,700 Supplies 32,500 Prepaid Rent 23,500 Accounts Payable $ 1,700 Notes Payable 17,000 Common Stock 33,500 Retained Earnings 7,700 Dividends 2,700 Service Revenue 55,300 Salaries Expense 18,700 Advertising Expense 11,700 Rent Expense 8,700 Utilities Expense 6,700 Totals $ 115,200 $ 115,200 Required: 1. Prepare the necessary closing entries. (If no entry is required for a particular transaction/event, select "No Journal Entry Required" in the first account field.) 2. Calculate the ending balance of Retained Earnings. 3. Prepare a post-closing trial balance