1. The Defendant is 50,8950,000 won to the Plaintiff and 6% per annum from March 31, 2017 to September 4, 2019.

1. Facts recognized;

가. 피고가 원고에게 원래 2017. 2. 28.까지 ‘트렌짓 앰뷸런스용 ABS(200개)'를 납품하기로 약정하면서, 원고와 피고가 2016. 11. 초순경 함께 만든 <납품계약서(☞ 갑 3; 이하 편의상 거기에 담긴 법률행위를 ’이 사건 최초 납품계약‘이라고 한다)>에 납품대금이 4억 5,000만원(부가가치세 별도)으로 명시되어 있고, 이에 따라 피고가 2017. 3. 30.까지 원고에게 그 납품대금 중 3억 6,000만원(= 6,750만원 6,750만원 9,000만원 6,750만원 6,750만원)을 지급한 사실과 2016. 12.경 피고의 요청에 따라 당초 약정한 제품 중 장의자, 장비 수납함 등의 재질을 ABS에서 목재로 바꿔 만들어 납품하기로 서로 간에 약정한 다음, 이에 따라 별도의 <전자세금계산서(☞ 갑 5)>가 발행된 당일(☞ 2017. 2. 14.) 피고가 원고에게 6,600만원을 추가로 지급한 사실은 당사자 사이에 다툼이 없고,

B. In the process of making a product supplied by the Plaintiff due to a defect in the part of which the Defendant was supplied by the Plaintiff, the fact that the Defendant separately paid a total of 63.5 million won (i.e., KRW 4 million in E) to another household business entity on March 14, 2017 through May 12, 2017 (i.e., KRW 40 million in E) in addition to KRW 43.5 million in E., KRW 40 million in the amount of KRW 43.5 million in the amount of KRW 40 million in the amount of “E”).

2. Determination on both arguments

A. As the cause of the instant claim, the Plaintiff filed a claim against the Defendant for the payment of the remainder of KRW 90 million under the instant first supply contract (i.e., KRW 450 million - KRW 360 million - KRW 360 million). In addition, the Defendant first contests that the Plaintiff paid KRW 20 million in addition to the above KRW 360 million (i.e., KRW 8 million on November 19, 2016) more to the Plaintiff on August 10, 2017, KRW 10 million on August 15, 2017, and thus, the instant case was examined, (ii) according to the partial descriptions of KRW 1-8 and 1-9, the Defendant’s case was examined.