The items need not be stated in the sequence or order set forth above; additional items may be included to explain the calculations involved in determining the amount to be paid by the buyer.
If any such policy or certificate is canceled, the unearned insurance premium refund received by the holder of the contract must be credited to the final maturing installments of the retail installment contract except to the extent applied toward payment for similar insurance protecting the interests of the buyer and holder of the contract or either of them.
N.D.C.C. § 51-13-02