Which of the following tells the customer exactly what has been sold to him, the amount due and any discount granted?

The document that tells the customer exactly what has been sold to him, the amount due and any discount granted is called an invoice. An invoice is a commercial document issued by a seller to a buyer, indicating the products, quantities, and agreed prices for products or services that the seller has provided to the buyer. The invoice is used to request payment from the buyer, and it serves as a record of the transaction between the two parties. It is an essential document for businesses to keep track of their sales and payments, and it is often required for accounting and tax purposes.