Beau went shopping at ABC Carpet. He saw some carpet he liked but could not make up his mind. The manager at ABC Carpet wrote down the proposed purchase price for him along with a statement that the price would be good for three months. Two months later, Beau went back to ABC Carpet to purchase the carpet. Unfortunately, the price had gone up. Beau showed the manager his writing and guaranteed price, but the manager said that the offer was no longer good. Although he had to pay more than the ABC manager had initially promised, Beau proceeded to purchase his carpet from ABC Carpet, and he also contracted with ABC to do the installation. Unfortunately, Beau almost immediately started to have problems with the carpet. Beau told the sales manager of ABC Carpet that he was planning on bringing suit for breach of warranty. The sales manager, however, told him that the breach of warranty provisions only applied to sales of goods and that the carpet purchase was for installation, a service. What kind of offer did the manager at ABC Carpet make to Beau?