Final answer:
The final step in the five-step process for completing a sale is reviewing the order.
Step-by-step explanation:
The final step in the five-step process for completing a sale is Reviewing the order. This step involves going over the details of the order with the customer to ensure accuracy and address any final questions or concerns. It is important to review the order to make sure that both the seller and the buyer are in agreement before proceeding with the sale.