Your firm is the auditor of Zehra and Katty Co. The audited financial statements for the year ended December 31, 2019, show the company's revenue was $ 4.9 million and the profit before tax was $464,000. The part of the working papers that records audit work on the bank reconciliation at December 31, 2019, noted cash receipts of $18,500 recorded in the cash book before the year end that were not credited to the bank statement until a week after year end. No further work was carried out because the amount was not considered material, and that conclusion was noted in the audit working papers. In March 2020, the company investigated delays in depositing cash receipts and discovered a fraud of $45,000. The fraud was carried out by the cashier who was responsible for depositing all receipts and preparing the bank reconciliation.

Required

a. What further work should the auditor have done in this situation (if any)?

b. Should this have been reported? If so, to whom?