The ledger of Saddler Company includes the following unadjusted balances: Prepaid Insurance $3,000, Service Revenue $58,000, and Salaries and Wages Expense $25,000. Adjusting entries are required for (a) expired insurance $1,800; (b) services provided $1,100, but unbilled and uncollected; and (c) accrued salaries payable $800.