The owner of a three-story building donated it to a charity. the charity engaged a contractor to repurpose the building to meet the charity’s needs and convinced the contractor to forego any profit from his efforts. the charity agreed to pay the contractor $10,000 when the contractor began the work, and an additional $30,000 whenever the contractor completed work on a story of the building. the charity made the initial payment of $10,000 to the contractor, and a payment of $30,000 when the contractor finished the first story of the building. as the contractor was working on the second story, the charity’s board decided to apply the funds that had been earmarked for the building to another purpose that the board determined was more worthwhile. at that time, the contractor had incurred $55,000 in material and labor costs. after receiving notice from the charity to cease work, the contractor was able to use $6,000 worth of the materials purchased for this job on another construction job. the contractor sued the charity for breach of contract, seeking expectation damages. how much is the contractor entitled to recover from the charity