The plaintiff's claim against the primary defendant is dismissed.

The conjunctive defendant shall pay to the plaintiff KRW 22,259,230 and this shall apply.

1. Basic facts

A. On December 21, 2017, the Plaintiff participated in the bid for the dual window of the main hall and the gymnasium replacement construction project (hereinafter “instant construction project”) in accordance with the construction announcement publicly notified by the primary Defendant as the ordering authority, and concluded the construction contract by setting the construction cost of KRW 299,703,890 on December 21, 2017 and 50 days from the commencement date of construction

A bill of quantity of materials of design drawings, construction specifications, double 24m (5 way 14 metres 5 metres 500000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000

B. Design drawings of the instant construction contract, general specifications and bill of quantity of materials for glass to be used in the instant construction project are indicated as follows:

(The bill of quantity of materials contains a separate description of the product in glass).

The bid for the instant construction project is a “total bid” method that only reflects the construction cost at the time of participation, and at the time of the public announcement, the ordering authority publicly announced the basic amount along with the specifications and bill of materials for the instant construction project, and the Plaintiff participated in the tender by setting the bid price based on the

After that, the ordering authority issued the original construction statement to the Plaintiff to calculate the basic amount, and the Plaintiff prepared a construction statement attached to the instant construction contract with reference thereto.

The construction specifications include the items of glass materials and the unit price as follows:

The unit price of glass material shall be the same as the amount entered in the construction statement provided by the main contractor.

180,100,100 11,81,800,800 m24 m2,000 m2,00 m2,00 m23,00 m2,00 m2,000 m2,00 m2,000 m2 (5 m2,00 m2,00 m2,000 m2,000 m2,000 m2,000 m2,00

D. The Plaintiff’s performance of the instant construction is the price for the C glass material, which is a specific product written in a bill of quantity.