課金 かきん動作 どうさ有効 ゆうこう期間 きかんでしょう
kakindōsayūkōkikandeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 課金動作有効期間

1. Probably valid for a period.; Likely a limited-time offer.

Polite
Presumptive
Conjecture
Computing