A contractor has agreed to build a home for Jane for $300,000. Early in the construction of the home, Jane is informed by the bank that she can only have a $280,000 loan. Jane speaks to the contractor, asking if he would drop his price by $20,000. As it happens, she called the contractor while he was watching his daughter on stage accepting an award for her dance performance. He took Jane's call and being so emotionally overwhelmed at the time by his daughter's success, that he told Jane sure, no problem. However, when it came time for final payment, he told Jane he changed his mind and needs full payment. Jane comes to see you, her lawyer, and asks for your advice. What do you tell her