(1) If the seller reserves the right of redemption at the time of the contract of sale, the seller may redeem the object of a sale by returning the purchase-money received and the expenses relating to such a sale borne by the buyer.
(2) If any specific agreement concerning the redemption money has been made between the parties referred to in paragraph (1), such agreement shall govern the matters concerning redemption money.
(3) Unless a specific agreement has been made between the parties in the cases of paragraphs (1) and (2), the fruits of the object of the sale and the interest on the purchase-price shall be deemed to have been set-off against each other.