63A [Notice fixing additional final period for buyer's performance];

64A21 [Seller's right to avoid contract (grounds for avoidance): buyer does not pay or take delivery within an additional period set by the seller under art. 63];

74A [General rules for measuring damages: loss suffered as consequence of breach];

75A1 [Damages established by substitute transaction (substitute transaction after avoidance): resale by aggrieved seller];

76B [Damages based on current price];

77A [Obligation to take reasonable measures to mitigate damages]