勘定 かんじょう しりじゃありませんでした
kanjōshirijārimasendeshita

Noun
Desu Copula

The polite, past negative form of 勘定尻

1. It wasn't a mistake in the account.; It wasn't my error.; It wasn't a miscalculation.

Past/Perfective
Negative
Polite
Terminal Form