1. The plaintiffs' claims against the defendants are all dismissed.

2. The costs of lawsuit are assessed against the plaintiffs.

(3) If it is possible to accurately compare a bill of lading issued and perused by the authority awarding the contract at the time of the tender, the increased quantity - the contract unit price - the amount calculated at the time of the design modification - the amount of new expense: the rate of consultation x the rate of consultation x the rate of consultation x the rate of consultation x the rate of new expense at the time of the design modification x the rate of consultation x the rate of consultation x the rate of consultation x the rate of consultation x the rate of consultation x the number of new expense) - the amount increased by the settlement of the amount ordinarily generated in the field of civil works - the increased quantity: The new expense unit price at the time of the design modification - the rate of consultation x the rate of consultation x the rate of new expense at the time of the design modification x the rate of consultation x the rate of consultation x the rate of consultation x the rate of consultation x the rate of consultation x the total project cost increased by 20 months to the head of the Busan Regional Construction and Transportation Administration in accordance with the contract.