The term course of performance is defined in the Uniform Commercial Code as follows: (a) A "course of performance" is a sequence of conduct between the parties to a particular transaction that exists if:(1) the agreement of the parties with respect to the transaction involves repeated occasions for performance by a party; and (2) the other party, with knowledge of the nature of the performance and opportunity for objection to it, accepts the performance or acquiesces in it without objection. It is not necessary that the contract be ambiguous before course of performance will be considered.