Section 34. The debtor may in all cases cause the amount due for redemption to be ascertained at his own expense by three justices of the peace in the manner following: one of the justices shall be chosen by the debtor, one by the creditor, and one by the two first chosen; or if the creditor neglects to choose one, the justice chosen by the debtor shall appoint the other two. After a hearing before the three justices, they or two of them shall make and sign a certificate of the amount which they adjudge to be due for the redemption of the land, which certificate shall be final and conclusive between the parties. A tender by the debtor of the amount so adjudged to be due shall be a sufficient tender notwithstanding any previous tender.