Nancy and Oscar" were separated by a vacant lot between the two houses owned by Peter. Both Nancy and Oscar wanted to purchase the empty lot to increase their yard and play space. Peter signed a written memo to sell the lot to Nancy for 300,000. Peter then found Quincey willing to pay $500,00 and signed an agreement to sell the house to Quincey for $500,000. Peter offered Nancy $50,000 to withdraw from the agreement. Can Nancy refuse the $50,000 and force Peter to sell her the house for $300,000? Or can Peter force Nancy to pay $500,000 if she still wants the house? Is Peter free to change his mind and not sell the house to anyone?