Laker Incorporated's fiscal year-end is December 31, 2024. The following is an adjusted trial balance as of December 31. Accounts Cash Debit Required: Credit $ 12,000 Supplies 39,000 Prepaid Rent 30,000 Accounts Payable $ 3,000 Notes Payable 30,000 Common Stock 40.000 Retained Earnings 9.000 Dividends 4,000 Service Revenue 54,000 Salaries Expense 20,000 Advertising Expense 13,000 Rent Expense 10,000 Utilities Expense 8,000 Totals $136,000 $136,000 1. Prepare the necessary closing entries. 2. Calculate the ending balance of Retained Earnings. 3. Prepare a post-closing trial balance.