§12A-2-208.

§12A-2-208.
   
   (1) Where the contract for sale involves repeated occasions for
   performance by either party with knowledge of the nature of the
   performance and opportunity for objection to it by the other, any
   course of performance accepted or acquiesced in without objection
   shall be relevant to determine the meaning of the agreement.
   
   (2) The express terms of the agreement and any such course of
   performance, as well as any course of dealing and usage of trade,
   shall be construed whenever reasonable as consistent with each other;
   but when such construction is unreasonable, express terms shall
   control course of performance and course of performance shall control
   both course of dealing and usage of trade (Section 1-205).
   
   (3) Subject to the provisions of the next section on modification and
   waiver, such course of performance shall be relevant to show a waiver
   or modification of any term inconsistent with such course of
   performance.