To display desserts in restau- rants, Mario Sclafani ordered refrigeration units from Felix Storch, Inc. Felix faxed a credit application to Sclafani. The application was faxed back with a signature that appeared to be Sclafani's. Felix delivered the units. When they were not paid for, Felix filed a suit against Sclafani to collect. Sclafani denied that he had seen the application or signed it. He tes- tified that he referred all credit questions to "the girl in the office." Who was the principal? Who was the agent? Who is liable on the contract? Explain.