Del. Code tit. 6 § 2-202 : COMMERCE AND TRADE — UNIFORM COMMERCIAL CODE — SALES — FORM, FORMATION AND READJUSTMENT OF CONTRACT —202 - Final written expression: parol or extrinsic evidence TEXT PDF 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 performance, course of dealing, or usage of trade (§ 1-303); 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. 6 Del. C. § 2-202 5A Del. C. 1953, § 2-202; 55 Del. Laws, c. 349; 74 Del. Laws, c. 332, § 5.;