Final answer:
The original order number can be found in the purchase order.
Step-by-step explanation:
When performing an Advance XO, the original order number can be found in the purchase order. The purchase order is a document issued by the buyer to the supplier, specifying the details of the goods or services to be purchased. It typically contains the order number, date, quantity, price, and other relevant information.
For example, let's say a company wants to purchase 100 units of a product. They would create a purchase order and assign it a unique order number. This order number is used to track the status of the order, communicate with the supplier, and process payment.
In summary, the original order number can be found in the purchase order, which is a document containing the details of a purchase and serves as a reference for the buyer and supplier.