The Wurzer Corporation entered into a written contract to hire Dixon in an executive position for six years for $200,000 a year. After three years, Dixon asked for a raise of $25,000 per year. Wurzer at first refused, but then agreed because of the pressure placed on him by Dixon. After the sixth year Dixon left his position with the Corporation and Wurzer sued for a return of the extra $25,000 per year for the three remaining years on Dixon's contract. Who should win the case?