The adjusted trial balance for PI Detectives reported the following account balances: Accounts Receivable $520; Supplies $9,200; Prepaid Insurance $7,400; Equipment $29,000; Accumulated DepreciationEquipment $4,200; Accounts Payable $220; Unearned Revenue $5,200; Notes Payable $3,200; Common Stock $23,000; Retained Earnings $5,900; Dividends $3,200; Service Revenue $34,800; Salaries and Wages Expense $21,000; and Depreciation Expense $1,100.

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