A. In full view of the overall purport of the pleadings as to the evidence Nos. 1 and 3, the Plaintiff is engaged in manufacturing and wholesale business of lighting fixtures and lighting fixtures, and the Defendant is engaged in wholesale and retail business of lighting fixtures, such as lighting fixtures. The Plaintiff supplied the Defendant with goods equivalent to KRW 108,642,380, a total of KRW 39,384,480, in total, to the Plaintiff from October 2013 to July 10, 2014. The Defendant paid a total of KRW 39,384,480 to the Plaintiff; the Defendant prepared and issued a letter of undertaking to repay obligations that the remainder of the obligation owed to the Plaintiff on August 19, 2014; and the last day of the following month can be recognized as the date of the supply of goods.

B. According to the above facts of recognition, the defendant is obligated to pay to the plaintiff 69,257,90 won and damages for delay at each rate of 6% per annum prescribed by the Commercial Act from September 1, 2014 to December 29, 2014, the delivery date of a copy of the complaint of this case, and 20% per annum prescribed by the Act on Special Cases concerning the Promotion, etc. of Legal Proceedings from the next day to the day of full payment.

C. The defendant's defense is justified since the defendant suffered a loss of KRW 3.260,00 due to the defect in the goods supplied by the plaintiff, and thus the plaintiff cannot respond to the plaintiff's claim, but there is no evidence to acknowledge it.

2. It is so decided as per Disposition by the assent of all participating Justices on the ground that the plaintiff's claim of this case is reasonable.