Section 11-2-202. 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 (Code Section 11-1-205) or by course of performance (Code Section 11-2-208); 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.

Code 1933, § 109A-2--202, enacted by Ga. L. 1962, p. 156, § 1.