6-23 (OBJECTIVE 6-4) The following are examples of documentation typically obtained by auditors: 1. Duplicate sales invoices 10. Bank statements 2. Receiving reports 11. Cancelled payroll checks 3. Minutes of the board of directors 12. Cancelled notes payable 4. Signed W-4s 13. Payroll time cards 5. Subsidiary accounts receivable records 14. Purchase requisitions 6. Vendors' invoices 15. Articles of incorporation 7. General ledgers 16. Remittance advices 8. Title insurance policies for real estate 17. Signed lease agreements 9. Notes receivable 18. Duplicate copies of bills of lading a. Classify each of the preceding items according to type of documentation: (1) internal Required or (2) external. b. Explain why external evidence is more reliable than internal evidence