B. The defendant asserts that the defendant should reduce the construction cost by taking into account the amount reduced from the ordering office or the bid price ratio of the above amount in calculating the unpaid construction cost for the plaintiff, as alleged by the plaintiff, because the plaintiff did not perform, in particular, the work of washing water manufacturing among the types of work stipulated in the subcontract of this case and the part of the work of treating wastewater was not performed, and thus, the defendant should reduce the construction cost by taking into account the amount reduced from the ordering office or the bid price ratio of the above amount.

3. Determination

A. First, we examine whether the Plaintiff carried out the part of the washing machine manufacturing work stipulated in the instant subcontract.

(6) In full view of evidence evidence Nos. 2, Gap evidence Nos. 4 and 5, Eul evidence Nos. 5, and Eul evidence Nos. 9 and the purport of the pleadings as a whole, the part concerning the manufacturing of two kinds of washing tanks (standard 1700*110*100*100, standard 150*1500) shall be calculated as a total of 24,450,00 won; the part concerning the manufacturing of washing tanks attached to the subcontract of this case shall be calculated as 2,20,000 won; < Amended by Presidential Decree No. 1750, Sep. 27, 2013; Presidential Decree No. 17509, Feb. 1, 2013; Presidential Decree No. 17500, Feb. 6, 2005>