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E4-20 Selected year-end account balances from the adjusted trial balance as of December 31, 2017, for Tippy Corporation is provided below. Debit Credit Accounts Receivable Dividends Depreciation Expense Equipment Salaries and Wages Expense Accounts Payable Accumulated Depreciation-Equipment Unearned Rent Revenue Service Revenue Rent Revenue Rent Expense Retained Earnings Supplies Expense 72,600 26,300 13,200 212,800 91,100 $ 53,000 114,800 22,900 183,800 6,200 3,600 61,800 1,400 Instructions (a) Prepare closing entries (b) Determine the post-closing balance in Retained Earnings