(a) A buyer shall be given a written receipt for any payment when made in cash.
(b) Upon written request of the buyer, the holder of a retail installment contract shall give or forward to the buyer a written statement of the dates and amounts of payments and the total amount unpaid under the contract. This statement shall be given the buyer once without charge; if an additional statement is requested by the buyer, it shall be supplied by the holder at a charge not in excess of $1 for each additional statement supplied.