4B [Scope of Convention: mistake (analysis of domestic law)];

8A [Interpretation of party's statement or other conduct: intent of party making statement or engaging in conduct];

25B [Definition of fundamental breach: impact of ability of aggrieved party to suspend performance];

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

71A1 [Suspension of performance: grounds for suspension];

79B [Impediments excusing party from damages: decline in exchange rate for rubles held not to qualify]