Option 1. The additional charge shall be computed on the amount of the scheduled installment or installments extended, deferred or reduced, for the period or periods for which each installment or part thereof is extended, deferred or reduced, at the rate of 1% per month.
Option 2. The holder of a home repair contract may, by written agreement, renew the entire unpaid balance owing on a home repair contract and may make a charge therefor at the rate charged in the contract so renewed, from the date of renewal to the maturity of the final installment.
N.J.S. § 17:16C-68