Consider the following information from a company's unadjusted trial balance at December 31, 2018. All accounts have normal balances. Accounts Received 4,500 Accounts payable 650 Cash 1,700 Service Revenue 5,500 Common Stock 4,000 Equipment 4,900 Insurance Expense 400 Land 3,800 Notes Payable, due 2018 4,000 Notes received matures 2020 1,200 Prepaid insurance 400 Retained earnings January 1, 2018 7,850 Salaries and wages expense 3,700 What is the total of the credit side of the unadjusted trial balance? O22,000 17,350 16,500 13,500