Listed below are audit situations that may affect the audit of receivables and revenue.

a. The audit of a machinery manufacturing company that engages in bill and hold transactions.

b. The audit of a software company that engages in agreements with multiple performance obligations that involve a fixed fee for software, updates, and customer support.

c. The audit of a construction company that enters into long-term construction contracts.

d. The audit of a manufacturing company that uses complex sales agreements that allow product returns under certain circumstances.

e. The audit of a software company whose salespeople often modify the terms of sales contracts with various side agreements.

Required:

For each circumstance, provide an explanation of its audit significance and any special audit procedures that would result.