We were pleased to receive your letter of [date]. After a careful consideration of your terms, we have decided to accept your proposal that we send you a trial delivery of our [products] on consignment.
We are therefore sending you a representative selection of our most popular lines. The consignment is being shipped by [ship], leaving [port] for [destination] on [date]. We will send you bill of lading and other shipping documents as soon as we receive them. In this letter, we are enclosing a pro forma invoice showing prices at which the goods should be offered for sale.
We hope you will find a ready sale for our products.