Answer:
performance of a contract
Explanation:
When you enter a contract you can perform your part of the contract, not perform your part of the contract or partially perform your part of the contract. In legal terms, there is no such thing as over performance.
in this case, Zack performed his part of the contract. Him making a slightly higher deposit or getting the inspection done before the due date, will not alter the total consideration of the contract, e.g. selling price will remain unchanged and the house will be the same one.
