The increased funds resulting from the increased fees under sections five, nine and fourteen of this article shall be used only (a) for the employment of an investigator or investigators pursuant to section two of this article, (b) for the reimbursement of necessary expenses of such investigator or investigators upon the submittal of proper vouchers therefor, (c) for the payment of additional expenses necessitated by the conduct of the office of such investigator or investigators, and (d) upon payment of the total expenses, including salaries of such investigator or investigators, any remaining funds shall be used for the conduct of the office of the West Virginia board of pharmacy.