"Retail charge agreement" means an agreement entered into or performed in this state prescribing the terms of retail installment transactions in which the buyer may pay, in installments, to a retail seller, the unpaid balance due in a retail installment transaction, whether or not a security interest in the goods sold is retained by the seller, and under the terms of which a finance charge is to be computed in relation to the buyer's unpaid balance from time to time.
NRS 97.095