4A [Scope of Convention (issues excluded): Agency (validity issues)];

7A3 [Observance of good faith: interpretation of contract];

8C [Interpretation in light of surrounding circumstances];

50A [Buyer's right to reduce price for non-conforming goods];

54A [Buyer's obligation to pay price of goods];

62A [Seller's right to compel payment of price];

78A ; 78B [Interest on delay in receiving price or any other sum in arrears ; Rate of interest]