Without prejudice to the provisions of the first paragraph of article R. 228-91, when a company carries out a capital increase by capitalising reserves, profits or share premium and distributing bonus shares, the subscription or purchase price of the shares under option, as fixed prior to this operation, is adjusted by multiplying this price by the ratio between the number of old shares and the total number of old and new shares; in establishing this ratio, account is taken, where appropriate, of the existence of several classes of old and new shares.