How do I calculate for the retained earnings missing box?

Dale Accounts and explanation Debit Credit SMART TOUCH LEARNING Adjusted Trial Balance December 31, 2016 Service revenue 46100 income summary 46100 Balance Debit Credit Account Title To close Revenue 15.300 Accounts Receivable 8.400 Dale Accounts and Explanation Debit Credit Office Supplies 200 Dec 31 V income summary 9600 Prepaid Rent 10,200 rent expense Furniture 17,800 interest expense Accumulated Depreciation- Furniture Supplies expense Accounts Payable salaries expense 3500 Salaries Payable depreciation expense-furt 2000 Interest Payable Todos Edenses Unearned Revenue Noles Payable 7,100 Dale Accounts and Explanation Debit Credit Common Stock 10,000 income Summary Retained Carnings 10.200 retained earnings Dividends 25,900 To close Income Summary Service Revenue 46,100 Dale Accounts and Explanation Debit Credit Depreciation Expense. Furniture 2.000 retained earnings 25900 Interest Expense 200 dividends 25900 Rent Expense 3.000 To close Dividends Salaries Expense 3.500 Supplies Expense 800 Total 87,400 87.400