Irvine Corporation's fiscal year-end is December 31, 2024. The following is a partial adjusted trial balance as of December 31. Credit $19,000 Accounts Retained Earnings Dividends Service Revenue Interest Revenue Salaries Expense Rent Expense Advertising Expense Insurance Expense Interest Expense Debit $1,900 13,900 4,900 1,900 9,900 3,900 39,000 4,900 Required: 1. Prepare the necessary closing entries. 2. Calculate the ending balance of Retained Earnings.