Questione giuridica chiave
Whether the first-instance court costs could be calculated from the full purchase price rather than the claimed installment amount
Decisione estratta
No. In a claim for the first due installment, the relevant dispute value was the amount claimed at filing; the economic-interest exception did not justify using the full purchase price.
Motivazione estratta
Only the first installment was due when the action was filed, and only that claim could be finally decided. The validity of the contract was merely a preliminary issue and no declaratory request concerning the whole contract existed. Applying the economic-interest rule to the entire purchase price was arbitrary.