Md. Code, Com. § 2-202

Current with changes from the 2024 legislative session from Chs. 2 through 1049, effective on or before 6/1/2024
Section 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 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.

Md. Code, CL § 2-202