1. The Defendant shall pay to the Plaintiff KRW 66,00,000 and the interest rate of KRW 15% per annum from December 7, 2018 to the day of complete payment.

Comprehensively taking account of the respective descriptions and arguments as to Gap's evidence Nos. 1, 2, and 3, the fact that the plaintiff was awarded a subcontract for the installation work from the defendant on April 30, 2018, and the defendant agreed to pay the plaintiff the completed portion once a month, the defendant is obligated to pay the plaintiff the amount of 16,272,00 won (70%) for the equipment installation work, 12,268,189 won for the water supply and demand pipe work (80% for the water supply and demand pipe work), 3,652,49 won for the water supply and demand pipe work (80% for the water supply and demand pipe work), 34,351,56 won for the ventilation work (90% for progress), and 34,351,556 won for the air ventilation work (90% for delay), and the defendant is obligated to pay the plaintiff the total amount of 6,600,000 won for the above damages for delay from 201.

Therefore, the plaintiff's claim is justified, and it is so decided as per Disposition by applying Articles 98 and 213 of the Civil Procedure Act to the burden of litigation costs and the declaration of provisional execution.