What can happen if Employee D is the one who prepares both the receipt and the bank reconciliation statement?

5. If you are the store manager for the company, and you only hired five employees to work for the store. Employees A, B, C are all sale persons for the store who keep all the sales records for the store; Employee D is the only cashier cum accountant who deposits the receipts daily in the bank. Employee E handles all the payment matters for the store. He/she is also the record- keeper who keeps the accounting books for the store. What can happen if Employee D is the one who prepares both the receipt and the bank reconciliation statement