On June 1, Alfred sent a signed letter to Sally and offered to sell the antique dining room table and six chairs from his dining room to Sally for $800. In the letter he stated that the offer would remain open until October 30. The letter was received on June 2.

On October 15, Alfred wrote Sally informing her that he had sold the table and chairs to his sister and that the offer was terminated. The letter was received by Sally on October 16.

On October 17, Sally wrote Alfred stating that she accepted Alfred's offer. The letter was mailed that same day by authorized means. The letter was received on October 18.

Alfred immediately called Sally and insisted that he had sold the dining room set to his sister.

Sally sues Alfred for breach of contract. Judgment for whom? Explain.