List two substantive analytical procedures that can test accounts payable. What potential errors or fraud can be identified by each analytical procedure?

Substantive Analytical Procedures:

• Compare payable turnover and days outstanding in accounts payable with previous years' and industry data.
•  Compare current-year balances in accounts payable and accruals with prior years' balances.
  Potential Error or Fraud:
• Under- or overstatement of liabilities and expenses