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 an invoice. An invoice is a commercial document that itemizes the goods or services provided, the quantity, the price, and the terms of payment for the transaction. It serves as a record of the transaction and as a request for payment from the customer. In other words, an invoice is a document sent by a seller to a buyer that specifies the amount and cost of products or services that have been provided and payment details.