Potato prices have fluctuated dramatically over recent months. September 5, Andrew, a wholesaler, wrote to Henry, a retailer, offering to sell one hundred 101b bags of potatoes at $2.25 per bag. Henry received Andrew's letter on September 7. A few weeks later Henry checked the wholesale price and discovered that it had jumped to $2.75 per bag. September 28, Henry wrote to Andrew accepting his offer. Andrew did not receive Henry's offer until October 5. Andrew refused to sell at $2.25 per bag but expressed a willingness to sell at $2.90 per bag. Henry sued Andrew for breach of contract that he alleged existed between them