The incidence of taxes imposed by this chapter is declared to be on the consumer, user, or possessor, and when such tax is paid by any other person, that payment shall be considered an advance payment and shall be added to the price to be recovered from the ultimate user, possessor, or consumer. Every wholesaler who has paid such taxes shall, and every retailer who has paid such taxes may show the amount of such taxes as a separate item on any invoices that they may issue. ONCA 06-10, eff. Sept. 29, 2006.