In responding to an inquiry letter, answer the questions if you can. If you cannot, either because you don’t know the answers or because you cannot divulge proprietary information, explain the reasons and offer to assist with other requests.

The writer responds graciously.

The writer answers the three questions posed in the inquiry letter.

The writer encloses other information to give the reader a fuller understanding of the product.

The writer uses the enclosure notation to signal that she is attaching an item to the letter.

The writer indicates that she is forwarding a copy to her supervisor.