You are the internal auditor of Cyber Star Limited ("Cyber"). Cyber uses a batch input system to process transactions in an integrated accounting system. During the audit of trade receivables and sales, you were assigned to perform walk-through tests on the trade receivables and sales application program for the year. The following errors were detected: (1) The price of an item on one of the invoices was incorrectly entered into the system as R10 001. The maximum selling price of any item is R10 000. (2) A sales invoice for an amount that exceeded the customer's pre-authorised credit limit was entered into the system. (3) An invoice was identified where the VAT number of a client had not been entered into the system. REQUIRED (6) Explain the automated controls that should be in place for each item.