Allied Shelving and Equipment, Inc., sells and installs shelving systems. National Deli, LLC, contracted with Allied to provide and install a parallel rack system (a series of large shelves) in National's warehouse. Both parties were dissatisfied with the result. National filed a suit in a Florida state court against Allied, which filed a counterclaim. Each contended that the other had materially breached the contract. The court applied common law contract principles to rule in National's favor on both claims. Allied appealed, arguing that the court should have applied the UCC. When does a court apply common law principles to a contract that involves both goods and services? In this case, why might an appellate court rule that the UCC should be applied instead? Explain.