Last month, the Kosher whole chicken was mistakenly priced ridiculously low- $8 instead of the average price of $16 We knew it was a mistake because the chicken was labelled, weighed and priced as chicken bones when in fact it was a whole chicken. Should it be reported to the kosher department or just pay what is on the package?
Assuming that you are referring to a Jewish-owned store, the mistake should be brought to the attention of the stores management. This is a form of hashovas aveida, saving them from a monetary loss. And yes you should pay the correct price and not merely what is on the sticker, as it is clearly a mistake