A concern in all audits is the risk that payments are made that do not represent valid expenses. One common test is to match payments to valid invoices, and you must use IDEA to perform this test.

Required: 

Match the paid invoice numbers in the purchases data set with the invoice numbers in the cash disbursements data set. Are there unmatched invoices from the purchase data? Are there any disbursements with invoices that do not match to the purchase data? What are the possible causes for discrepancies between these data sets? How would the auditor address these discrepancies?