Transactions Substantive procedures Assertion Inspect the sales transaction file, billings and other supporting documents immediately before and after the i. Revenue financial year end date and determine whether the transactions were recorded in the proper period Inspect the postings of totals in the Payroll payroll transaction file and trace them to expense the general ledger Vouch the posting of items in the iii. Purchases payables transaction file to supporting documentation Compare the number and amounts of iv. Revenue credits issued with those of prior periods Sales Trace a sample of sales transactions to commission corresponding commissions Identify the audit objective that relates to each of the following assertions. Transactions Assertions Audit objective i. Revenue Completeness ii. Cost of sales Classification Payroll Accuracy expense iv. Other revenue Cut-off Interest Occurrence expense