Chapter 25-Jeep Case Kristi and Jen enter into an agreement that Kristi will buy Jen's Jeep from her today, with the payment of $10,000 coming when Kristi gets her tax refund. Kristi types up an "1.0.U" that says, "1, Kristi Jones, promise to pay the sum of $10,000 plus interest, to Jen Erickson." Kristi signs the document, but Jen does not. There is no date of any sort on the document When Kristi doesn't pay for 18 months, can Jen sue for payment on the document and recover?