The adjusted trial balance for PI Detectives reported the following account balances: Accounts Receivable, $500; Supplies, $9,000; Prepaid Insurance, $7,200; Equipment, $28,000; Accumulated Depreciation, $4,000; Accounts Payable, $200; Deferred Revenue, $5,000; Notes Payable, $3,000; Contributed Capital, $22,000; Retained Earnings, $5,700; Dividends, $3,000; Service Revenue, $33,800; Wages Expense, $20,000; and Depreciation Expense, $1,000. 

Prepare an adjusted trial balance as of December 31, and solve for its missing Cash balance.