Presenting the Illinois Appellate Court with a question of first impression about the scope of quasi-contractual relief for unjust enrichment, C. Szabo Contracting — a subcontractor’s subcontractor on an Illinois State Toll Highway Authority project — sued a general contractor, Lorig Construction Co., for $215,400. This was the alleged value of Szabo’s work in installing underground pipes for a storm sewer. The quasi-contract remedy usually doesn’t apply when the plaintiff supplied …