On March 1, Ben, a property owner, and Carl, a licensed contractor, executed a written agreement containing the following provisions:
1. Carl agrees to construct a residence using solar panels and related electrical equipment manufactured by Sun Company (â€œSunâ€) and to complete construction before Thanksgiving.
2. Ben agrees to pay Carl $200,000 upon completion of construction.
3. Ben and Carl agree that this written agreement contains the full statement of their agreement.
4. Ben and Carl agree that this written agreement may not be modified except upon written consent of both parties. Prior to execution of the written agreement, Ben told Carl
(i) that Carl had to use Sun solar panels and related electrical equipment because Sun was owned by Benâ€™s brother, and
(ii) that Carl had to complete construction prior to Thanksgiving. Carl assured Ben that he would comply. In August, Ben began to doubt whether Carl would complete construction prior to Thanksgiving; Ben offered Carl a $25,000 bonus if Carl would assure completion, and Carl accepted and gave his assurance. To complete construction prior to Thanksgiving, Carl had to use solar panels and related electrical equipment of equal grade manufactured by one of Sunâ€™s competitors because Sun was temporarily out of stock. Carl completed construction prior to Thanksgiving. Ben, however, has refused to pay Carl anything.
What are Carlâ€™s rights and remedies against Ben? Discuss.