The parties may agree to add the unpaid balance of a consumer credit transaction not made pursuant to open-end credit to the consumer's open-end credit account with the creditor. The unpaid balance so added is an amount equal to the amount financed determined according to the provisions on finance charge on refinancing, section 2-504. This section does not apply to consumer leases. [1973, c. 762, §1(NEW).]
9-A M.R.S. § 2-508