BLAW PLEASE HELP!!

In-N-Out makes a deal with Pete's Potatoes for delivery of 1,000 pounds of potatoes to each of its California locations once a week. In week one, Pete's Potatoes show up at In-N-Out and In-N-Out refuses to accept the delivery. If Pete's Potatoes sues for breach of contract, what type of law (CL or UCC) should the company argue and why? Common Law, because both parties are merchants and can agree on a price later Common Law, because Pete's Potatoes actually delivered the goods to In-N-Out UCC, because the parties made a deal with each other UCC, because the only definite term required is quantity