This section explains in greater detail the function that can be performed with computer audit software, using as an example an audit carried out by Jason Scott at Northwest builders Supply (NBS), a large retailer of lumber and building materials located in Tocoma ,Washington, and subsidiary company of Northwest Industries. Jason was assigned to accounts receivable information produced by NBS's computerized customer accounting system. This system maintains an accounts receivable master file and transaction detail fines for sales account, collection and credit memos. C record layouts for these were obtained by Jason and are reproduced Jason's supervis del the following objectives for the GAs or application te the current balance of every customer master record from the previous balance and the transactions and identify all accounts having an incorrect current balance 2. Sum the current collections. and credit maemo announts for verification of their totals other indepen dently against maintained 3. Perform edit checks on selected fields in each file to comfirm the data editing performed within NBs s data entry function Check the transaction any records that do not match with a rmaster record 5. Prepare an aging schedule. of the receivables and an analysis of accounts having current balances in excess of their credit limit in order to evaluate the sufficiency of NBS's allowance for uncollect ible accounts and to assess performance credit of NBS s department. Select a sample of accounts for confirmation in order to verify the existence and accuracy of the receivables recorded on NBS s cus tommer nnaster file