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

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

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

81A ; 81C [Effect of avoidance on obligations: rights to damages preserved; Restitution by each party of benefits received]