1. On June 1, a writer entered into negotiations with a printer to print a book the writer had recently completed. During their negotiations, the writer specified that the pictures in the book had to be in color, and that the books should be hard cover, not paperback. The printer told the writer that a hardcover book with colored pictures would cost $5 per book, whereas a paperback book with black and white pictures would only cost $4 per book. On June 15, the parties orally agreed that the printer would print 1,000 hardcover books with colored pictures at a cost of $5 per book, to be delivered to the writer's home on August 15. On June 20, the printer and the writer signed a document stating that the printer would print 1,000 paperback books with colored pictures for $5,000. The document did not state the delivery date or location. On August 20, the writer received a bill for $5,000 for 1,000 paperback books with colored pictures, with a note stating that the books were ready for pick up. The writer refused to pay for the books, and the printer sued him for breach of contract. At trial, the writer sought to submit evidence of the oral agreement on June 15 to show that the printer was to print hardcover books, not paperback books. Is this evidence admissible