The adjusted account balances of the Incredible Fitness at August 31 are as follows: Accounts Account Balances ($) Accounts Account Balances ($) Cash 16,000 Service Revenue 75,900 Accounts Receivable 15,000 Depreciation Expense 8,000 Prepaid Insurance 8,000 Insurance Expense 6,000 Equipment 100,000 Salaries and Wages 35,000 Expense Accumulated Depreciation - 19,000 Utilities Expense 8,900 Equipment Accounts Payable 4,000 Common Stock 82,000 Retained Earnings 18,500 Dividends 2,500 At the end of the accounting period, companies close Revenues, Expenses, and Dividends. Which one of the following journal entries is recorded correctly for closing net income to retained earnings at August 31? O DR: Income Summary $18,000; CR: Retained Earnings $18,000 o DR: Retained Earnings $75,900; CR: Service Revenue $75,900 DR: Service Revenue $75,900; CR; Income Summary $75,900 o DR: Income Summary $15,500; CR: Retained Earnings $15,500 O DR: Net Income $18,000; CR: Income Summary $18,000