Lynn Lyons had established a good dental practice in Riverton. She agreed with Gamma Dental Supply Company to purchase from them all of her required supplies for two years. She also decided to move into a new, expanded office, and ordered three new dental chairs from the Frane Company. The cost of the chairs was $9,000 and it was fully payable 60 days after delivery. The agreement with Gamma was mainly oral. The only document that could prove the agreement is a letter Lyons signed that outlines the general nature of her agreement to buy from them all of her required supplies. It contained no other specific terms. Gamma had signed no documents. Can Gamma enforce their agreement?