You have been assigned to perform tests of controls on the sales system at EDB as part of the 30 June 2018 audit. EDB is a wholesaler of a wide range of products. During testing, you noted the following errors:

1. Invoice no. 328 issued on 18 March 2018 matched the customer's order. However, the order was only partially filled because of a lack of stock in the warehouse, meaning items that were never delivered were included in the invoice. The error was discovered when the customer rang to complain about being overcharged.

2. No prices were entered on invoice no. 329 issued on 25 March 2018, resulting in a zero dollar invoice being issued. The error was discovered when accounts receivable staff queried the zero amount appearing on the accounts receivable ledger.

Required: Treating each of the listed errors independently:

a. Identify the assertions that are violated as a result of the errors listed above

b. Describe the internal control weaknesses in the revenues process of the company C. errors. Describe the application controls that would have prevented or detected each of the