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 Procedurally, in determining whether a term constitutes a material alteration courts have placed the burden of proof upon the party seeking the term's exclusion. See Bayway, 215 F.3d at 223-24; JOM, Inc. v. Adell Plastics, Inc., 193 F.3d 47 (1st Cir.1999); Avedon Eng'g, Inc. v. Seatex, 126 F.3d 1279 (10th Cir.1997); Comark Merch., Inc. v. Highland Group, Inc., 932 F.2d 1196 (7th Cir. 1991); but see Westech Eng'g, Inc. v. Clearwater Constructors, Inc., 835 S.W.2d 190 (Tex.App.1992). A party seeking the exclusion of a contractual term or provision pursuant to section 2.207(2), as constituting a material alteration, has the burden of proof. ...