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];

9C [Practices established by the parties];

11B [Formal requirements: proof of contract by any means, including witnesses];

14A1 [Criteria for an offer (basic criterion: intention to be bound in case of acceptance): definiteness of key conditions (price)];

15A [When offer becomes effective: effective on reaching offeree];

18A [Criteria for acceptance of offer];

19A1 [Reply purporting to accept but containing additions or modifications: in general, constitutes rejection and counter-offer];

55A [Open-price contracts: enforceability of agreements that do not make provision for the price]