Your client, Bamboo Ltd. has a system for inputting purchase and expense invoices where the operator inputs the following from each item.

1. Order number (a code 3221 is used for items like electricity)
2. Supplier name
3. Supplier code number

• First four letters of nominal account name (entered on an invoice by purchase department manager)
• Nominal account code (entered by purchase department manager)
• Date
• Goods inward note number
• Net amount
• VAT amount
• Gross amount

Required:

1. Suggest manual operation and controls which might previously have applied to these invoices.
2. Suggest input controls that might be applied by the program to these items.
3. List some audit tests that could be applied to these items indicating the purpose of each test and the relevant audit evidence obtained.