Final answer:
An approved sales order and actual shipment of goods represent a sales transaction, which leads to the issuance of a sales invoice. It is not a sales return nor a sales forecast.
Step-by-step explanation:
An approved sales order and an actual shipment of goods correspond to a sales transaction. When a customer's order is fulfilled and the goods are sent out, it culminates in the creation of a sales invoice, which is a document requesting payment for the goods shipped.
The sales invoice includes details such as the description of the goods, quantity, price, terms of sale, and payment information. Therefore, the correct answer is b. Sales Transaction. A sales return would be when goods are sent back by the buyer to the seller, and a sales forecast is an estimate of future sales, which is unrelated to the actual completion of a sales order.