The document provides information on what a letter of agreement is and how to write one. It defines a letter of agreement as a formal agreement between two parties for renting, working, subcontracting, buying, or lending money. It then provides details on the typical structure and elements of a business letter, including the letterhead, salutation, body paragraphs, signature, and enclosures. The purpose is to establish the terms of an agreement in writing so that both parties understand their obligations and there are no misunderstandings.