1. The defendant's appeal and the plaintiff's incidental appeal are all dismissed.

2. Costs arising from an appeal and an incidental appeal shall be respectively.

1. The reasoning of the judgment of the court of first instance to be adopted by this court is as follows: (a) “21,373,000 won” of the 9th two parallel judgments of the court of first instance shall be “21,372,00 won”; and (b) “1,016,000 won” of the 3 parallel judgments shall be “1,017,000 won”; and (c) so, it shall be cited as it is in accordance with the main sentence of Article 420 of the Civil Procedure Act.

2. In conclusion, the judgment of the court of first instance is justifiable, and both the defendant's appeal and the plaintiff's incidental appeal are dismissed as they are without merit. However, the "21,373,000 won" and "1,016,000 won" in the disposition of the court of first instance are clear and correct as they are "21,372,00 won" and "1,017,000 won" respectively. Thus, it is so decided as per Disposition.