25B [Definition of fundamental breach: substantial deprivation of expectation, etc.];

26A1 [Effective declaration of avoidance: notice to the other party required];

49A [Buyer's right to avoid contract: grounds for avoidance];

63A [Seller's right to fix additional final period for buyer's performance];

64A [Seller's right to avoid contract: grounds for avoidance];

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

75A2 [Damages established by substitute transaction after avoidance: repurchase by aggrieved buyer]