If a term is left open in a sale of goods contract,that open term or "gap" can be filled by inserting a presumption found in the UCC's "gap-filling" rules.

If a term is left open in a contract that meets these two standards,that open term or "gap" can be "filled" by inserting a presumption found in the Code's "gap-filling" rules.The gap-filling rules allow courts to fill contract terms left open on matters of price [2-305],quantity [2-306],delivery [2-307,2-308,and 2-309(1)],and time for payment [2-310] when such terms have been left open by the parties.