QUESTION INFORMATION: The table below consists of the trial balance for Brook Company as of December 31, 2020. Assume that all accounts have their normal debit or credit balance. Accounts payable Accounts receivable $100 200 Cash 800 Common stock 200 700 200 600 200 Dividends Insurance expense Land Prepaid rent Rent expense Retained earnings Salaries expense Service revenue Unearned revenue 500 1,000 400 2,000 300 QUESTION TO ANSWER: After all temporary accounts are closed to zero, Brook's retained earnings balance as of December 31, 2020 is $