Laker Incorporated's fiscal year-end is December 31, 2024. The following is an adjusted trial balance as of December 31. Accounts Debit Credit Cash $10,400 Supplies 31,000 Prepaid Rent 22,000 Accounts Payable $1,400 Notes Payable 14,000 Common Stock 32,000 Retained Earnings 7,400 Dividends 2,400 Service Revenue 55,600 Salaries Expense 18,400 Advertising Expense 11,400 Rent Expense 8,400 Utilities Expense 6,400 Totals $110,400 $110,400 Required: 1. Prepare the necessary closing entries. 2. Calculate the ending balance of Retained Earnings. 3. Prepare a post-closing trial balance