The correct answer is invoice.
An invoice is a document that lists the goods or services that have been sold, as well as the price of each item and the total amount due. It is typically sent to the customer after the goods have been shipped.
An agenda is a list of items to be discussed at a meeting.
A catalogue is a list of goods or services that are available for purchase.
An inventory is a list of all the goods or materials that a company has on hand.
In this case, the sender is requesting that the recipient send an invoice so that they can pay for the goods that have been sent.