Discussion Questions and Problems are examples of documentation typically ob- 7-25 tained by auditors: 1. Duplicate sales invoices 2. Subsidiary accounts receivable records 3. Vendors invoices 4. General ledgers 5. Title insurance policies for real estate 6. Notes receivable 7. Bank statements 8. Cancelled payroll checks 9. Cancelled notes payable 10. Payroll time cards 11. Purchase requisitions 12. Articles of incorporation 13. Receiving reports (documents prepared when merchandise is received) 14. Minutes of the board of directors 15. Signed w 4s (Employee's withholding Exemption Certificates) 16. Remittance advices 17. Signed lease agreements 18. Duplicate copies of bills of lading Required a. Classify each of the preceding items according to type of documentation (1) internal or (2) external. b. Explain why external evidence is more reliable than internal evidence. 7-26 (objective 7-4) The following are examples of audit procedures: 1. Calculate the ratio of sales commission expense to sales as a test of sale commissions. alsource.com/apivo/books/9780134067124/print?from 212&to 212