Please draft a complaint for breach of contract based on the facts below.

John asked Mary if she was interested in selling her home for $75,000. Mary told John that she would sell her home for $80,000. John agreed. Mary and John entered into a written agreement dated January 15 where Mary agreed to sell her home and John agreed to purchase her home for $80,000 cash. John tendered the $80,000 and Mary refused to transfer title. John has retained you to sue Mary for breach of contract.