A building complex is being remodeled based on designs from a reputable architect. The complex and a plumbing company enter into a contract in which the plumbing company agrees to install new pipes throughout the complex, based on the architect$$s instructions. The plumbing company installs the pipes and performs additional work $($which the architect is aware of$)$ that is outside the scope of the contract. The additional work raises the property value of the complex. The plumbing company is paid for the pipe installation, but not the additional work. The plumbing company sues the complex for payment for the additional work, saying the complex was unjustly enriched. What can the court do$?$ What should the court do$?$