Llоyd Cоmpаny hаd а cоntract with Progressive Oil to purchase 1,000 gallons of oil by December 1. The contract contained a provision that required all modifications to be written and signed by the company presidents. In early September, an executive of LLoyd talked with the purchasing agent of Progressive who orally agreed to provide 1,000 more gallons of oil by December 1. On December 1, when only 1,000 gallons had been delivered, LLoyd sued. The likely outcome of this lawsuit is