Part B (9 marks) Alexandra is managing an audit team undertaking work on a major client's accounts receivable ledger, with a 30 June 2021 year end. Her focus is on the posting of entries for sales and sales returns to the control account and individual debtors' accounts. The members of her team have each been given specific tasks, which are detailed in the audit program. A mostly substantive approach is being taken to the audit of accounts receivables for this client because, although controls at this client are generally good, the accounts receivables area is not significant enough to justify extensive controls testing. Due to staff shortages caused by COVID-19, Alexandra has been assigned a mostly inexperienced audit team. In some cases, the working papers have not been completed in sufficient detail and in others she has had to ask her audit team members to redo the work. Required a. Help Alexandra explain to her audit team why they must account for the numerical sequence of sales invoices, credit (sales returns), memos, sales orders, and shipping documents. (2 marks) b. One of the audit team members is checking credit memos. The task is to compare the credit memo and supporting documents with the entries to accounts receivable for sales returns and allowances in relation to dates, customers, products, quantities, prices, and amounts. He checks all memos with dates of up to and including 30 June and reports that he finds nothing unusual. Explain why Alexandra should send the audit team member back to examine credit memos with July 2021 dates. (3 marks) c. Why is it important for Alexandra to undertake some procedures herself, such as reviewing the accounts for unusual items, instead of assigning those tasks to the junior audit team members? What types of things would she be looking for when performing these procedures? (2 marks) d. What other procedures in an audit (i.e. not necessarily specific to accounts receivable) would be best performed by a more senior auditor? (2 marks)