Hi, can I get an explanation on how to find the correct and final retained earnings? I am confused on how to get the numbers. Thank you in advance.

Laker Incorporated's fiscal year-end is December 31, 2018. The following is an adjusted trial balance as of December 31 Credit Accounts Cash Supplies Prepaid Rent Accounts Payable Notes Payable Common Stock Retained Earnings Debit $ 10,100 29,500 20,500 $ 1,100 11,000 30,500 7,100 2,100 Service Revenue Salaries Expense Advertising Expense Rent Expense Utilities Expense 55,900 18,100 11,100 8,100 6,100 05,600 $ 105,600 Totals Required 1. Prepare the necessary closing entries. (If no entry is required for a transaction/event, select "No journal entry required" in the first account field.) Answer is not complete Date General Journal Debit Credit December 31 2018 01 55,900 > Service revenue Retained earnings 55,900 December 31 2018 2 Service revenue Advertising expense Rent expense Utilities expense Salaries expense 11,100 8,100 6,100 8,100 December 31 2018 Retained earnings 2,100 Dividends 2,100