Select from the option list provided the procedure (1-9) the auditor could implement to test the operating effectiv the internal control for each of the following situations. Each choice may be used once, more than once, or not a 1. Match prenumbered shipping documents with entries in the sales journal. 2. Trace sales invoices to account receivable subsidiary ledger. 3. Vouch bill of lading file to approved sales invoices. 4. Observe the client comparing receiving quantities, and inspect documentary evidence of comparison. 5. Confirm sales orders were sent to the credit department. 6. Match bill of lading file to approved sales orders. 7. Vouch purchase orders to the approved vendor list, and review the purchase order for correct customer nam product description, terms, dates, and quantities. 8. Review and reconcile voucher packages for three-way match of the purchase order, receiving reports, and 9. Inspect purchases occurring near year-end for recording in the appropriate period. To determine that purchases received have been recorded [Choose ] To detect failure to invoice a shipment. [Choose ] 10 To determine goods sent to customers are based only [Choose ] on authorized sales orders. To determine that all credit sales transactions of an entity are recorded. [Choose ] To detect purchases recorded in the wrong period. [Choose ]