Section 45.02.207 - Additional terms in acceptance or confirmation(a) A definite and seasonable expression of acceptance or a written confirmation that is sent within a reasonable time operates as an acceptance even though it states terms additional to or different from those offered or agreed upon, unless acceptance is expressly made conditional on assent to the additional or different terms.(b) The additional terms are to be construed as proposals for addition to the contract. Between merchants these terms become part of the contract unless (1) the offer expressly limits acceptance to the terms of the offer;(2) they materially alter it; or(3) notification of objection to them has already been given or is given within a reasonable time after notice of them is received.(c) Conduct by both parties that recognizes the existence of a contract is sufficient to establish a contract for sale although the writings of the parties do not otherwise establish a contract. In this case the terms of the particular contract consist of those terms on which the writings of the parties agree, together with supplementary terms incorporated under other provisions of the code.