LA COTORRA ALARM SYSTEM Trial Balance August 31, 2006 Cash Accounts receivable Prepaid rent Supplies Furniture Accumulated depreciation (furniture) Accounts payable Salary payable Unearned Service revenue John Wilhelm, capital. John Wilhelm, withdrawals Service revenue... Salary expense Rent expense Depreciation expense Advertising expense Supplies expense $ 7,100 19,800 2,400 1,200 19,700 $3,600 3,300 2,800 35,500 5,300 15,600 3,800 1,500.