1. All appeals against the instant principal lawsuit and counterclaim by the Defendant (Counterclaim Plaintiff) are dismissed.

2. The costs of appeal shall be the principal lawsuit.

The reasoning of this court is as stated in the reasoning of the judgment of the court of first instance, except for the fact that the cable supplied by the plaintiff to the defendant is not sufficient to recognize the manufacturing cost as a VV cable with lower manufacturing cost (0.7 x 3C) rather than EV (E) cable, and that there is no other evidence to prove otherwise, by itself, the statement in the main text of Article 420 of the Civil Procedure Act is cited as it is in accordance with the text of Article 420 of the Civil Procedure Act.

Therefore, the judgment of the first instance court is legitimate, and the defendant's appeal is dismissed as it is without merit. It is so decided as per Disposition.