1. The Defendant: (a) KRW 20,400,000 for the Plaintiff and 6% per annum from July 8, 2014 to October 7, 2015.

1. The judgment on the claim for the construction cost of equipment and boiler was awarded to C with a contract for the new construction work of Eunpyeong-gu Seoul Metropolitan Government D, and the Plaintiff completed the construction work of heating, hot water, etc. among the aforementioned new construction work by subcontracting the construction cost of KRW 14.4 million from C, and the completion of the boiler construction work (the construction cost of KRW 6 million) is without dispute between the parties, and the Defendant is liable to pay the above installation cost and boiler construction cost of the boiler. Thus, the Defendant is liable to pay the Plaintiff KRW 20.4 million (the construction cost of KRW 14.4 million) and damages for delay.

2. The plaintiff alleged that the above new construction was completed at the request of the above C, and sought payment of the amount equivalent to KRW 15 million to the defendant. However, the statement of the evidence Nos. 1, 3, and 7 is insufficient to recognize that the defendant who is the contractor is liable to pay the above electrical construction to the plaintiff who is the subcontractor, and there is no other evidence to acknowledge otherwise, the above assertion shall not be accepted.

3. Therefore, the defendant is obligated to pay to the plaintiff 20,400,000 won of the above construction price and damages for delay calculated at the rate of 6% per annum under the Commercial Act from July 8, 2014, which is the date following the delivery date of a copy of the complaint of this case sought by the plaintiff to the plaintiff, until October 7, 2015, which is the date of the decision of this case, and 20% per annum under the Act on Special Cases concerning Expedition, etc. of Legal Proceedings from the next day to the date of complete payment. Thus, the plaintiff's claim of this case is accepted within the above scope of recognition, and the remainder is dismissed as it is without merit. It is so decided as per Disposition.