事前 じぜん購入 こうにゅう割引 わりびき運賃 うんちんであれば
jizenkōnyūwaribikiunchindeareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of 事前購入割引運賃

1. If purchased in advance; If it's an advance purchase discount fare

Ba Conditional