49A1 [Buyer's right to avoid contract (grounds for avoidance): fundamental breach of contract];

73B [Anticipatory breach (avoidance in installment contracts): refusal of future installments];

74A ; 74A1 [General rules for measuring damages: loss suffered as consequence of breach; Includes loss of profit];

84A [Restitution of benefits received: seller bound to refund price must pay interest]