The costs of appeal are assessed against the plaintiffs.

The lower court invoked the legal doctrine of the Supreme Court en banc Decision 2012Da89399 Decided December 18, 2013, on the case where the claim for additional statutory allowances is rejected as it violates the good faith principle, on the basis of adding regular bonuses to ordinary wages and seeking additional statutory allowances based thereon, and as indicated in its holding, ① the instant regular bonus constitutes 700% per annum of ordinary monthly wages, and the statutory allowances to be additionally borne by the Defendant, given that the regular bonus constitutes overtime work ordinarily performed to the production workers, considerably exceeds the statutory allowances to be used as the materials for the negotiations between the labor and the management at the time of wage negotiations, ② the Defendant’s cumulative net income amount from 2008 to 2010 -60 billion won, ③ the Defendant’s demand for additional statutory allowances from 2008 to 2014 to 2014 to 200 billion won, ③ the Defendant’s demand for additional allowances from 2008 to 2014 to 2014 to 2014 to 2014 annually.