1. The Defendant’s KRW 15,681,600 for the Plaintiff and 5% per annum from December 29, 2014 to June 3, 2016.

1. Basic facts

A. The Defendant was awarded a contract for the part of the outer stone construction among the “B-built construction” (hereinafter “instant construction”). The Plaintiff was awarded a subcontract for the instant construction from the Defendant.

B. The Plaintiff performed the instant construction from September 10, 2013 to October 31, 2014.

C. By December 28, 2014, the Defendant paid the Plaintiff KRW 277,618,400 as the instant construction cost.

【Ground of recognition】 The fact that there has been no dispute, entry of Gap Nos. 3, 4, and 5, the purport of the whole pleading

2. Summary of the parties' arguments

A. Plaintiff 1) As to the calculation method of the construction cost of this case, the Plaintiff and the Defendant agreed to the so-called “unit price method” (the calculation of construction cost by setting the unit price according to the type of tin work and multiplying the unit price by the volume of construction work), but agreed to the so-called “daily method” (the calculation of construction cost by multiplying the worker’s daily pay by the number of working days) with respect to the portion of non-construction, defective parts, and the portion of a request for an additional construction for interesting construction other than the Plaintiff. The Plaintiff’s final payment of construction cost of this case is KRW 293,30,000, KRW 650,000, KRW 650,000, KRW 2,620,50, KRW 981,000, KRW 401,500, KRW 5000, KRW 4005, KRW 5000, KRW 4005, KRW 506,000, KRW 500.

3) Therefore, the Defendant shall pay to the Plaintiff KRW 20,083,100 (=293,300,000 won – KRW 4,401,500; KRW 277,618,400) and damages for delay for the payment thereof. (B) Defendant 1 is the construction cost for the portion of the first agreement with the Defendant among the construction works performed by the Plaintiff, which is KRW 229,932,00,00.