Section 2-A-202. Final Written Expression: Parol or Extrinsic Evidence.

Terms with respect to which the confirmatory memoranda of the parties
agree or which are otherwise set forth in a writing intended by the
parties as a final expression of their agreement with respect to such
terms as are included therein may not be contradicted by evidence of any
prior agreement or of a contemporaneous oral agreement but may be
explained or supplemented:

(a) by course of dealing or usage of trade or by course of

performance; and

(b) by evidence of consistent additional terms unless the court

finds the writing to have been intended also as a complete

and exclusive statement of the terms of the agreement.