The Brugger Corp. owned a farm, operated by Jason Weimer, who acted as the company’s business agent. Tri-Circle, Inc. was a farm equipment company. On behalf of Brugger, Weimer offered to buy from Tri-Circle certain equipment for use on the farm. Tri-Circle accepted the offer, using a pre-printed form. The form included a finance charge for late payment. Weimer’s offer had said nothing about finance charges, but he made no objection to the new term. Tri-Circle supplied the farm equipment but later alleged that Brugger had refused to pay for $12,000 worth of the supplies. Tri-Circle sued. In deciding whether Tri-Circle was entitled to finance charges, the court first inquired whether Brugger, Weimer, and Tri-Circle were merchants. Why did it look into that issue? Were they merchants?