In this case: c. if the court finds that Shawn has substantially performed, he will be able to recover the contract price less any damages caused by his failure to perform as promised.
Step-by-step explanation:
Harry signed a contract with Shawn to build a house. Harry made some specification to build the house. Shawn did not complete the house according to the specification of the Harry. So Harry refused to pay the contract amount.
Under doctrine of specific performance, the defendant, who has performed substantially, saving some part of contract which is not central to the contract unintentionally, he /she is entitled to receive the contract price as agreed less the money needed to correct the mistakes made by him.
So in this case, Harry can pay less money than the contract price.