6A Exclusion or modification of Convention by contract];

7A3 [Observance of good faith];

8A ; 8B ; 8C [Interpretation of party's statements or other conduct: intent of party making statement or engaging in conduct; Interpretation based on objective standards ; Interpretation in light of surrounding circumstances];

14A1 [Criteria for an offer: definiteness of key conditions];

18A [Criteria for acceptance of offer];

55A [Open-price contracts: enforceability of agreements]