The board shall have the authority to examine the books and records of any wine wholesaler to determine the accuracy of any return required to be filed with the board.
The markup as currently established by the board on spirituous or vinous liquors shall not be reduced by the board for the purpose of absorbing the tax levied in this subsection, it being the intention of this provision that the said tax shall be passed on to the purchaser.
Ala. Code § 28-3-204 (1975)