Ohio Rev. Code Ann. § 1333.17

A court in determining cost to the retailer and cost to the wholesaler shall receive and consider as bearing on the bona fides of such cost, evidence tending to show that any person complained against under sections 1333.11 to 1333.21, inclusive, of the Revised Code purchased cigarettes, with respect to the sale of which complaint is made, at a fictitious price, or upon terms, or in such a manner, or under such invoices as to conceal the true cost, discounts, or terms of purchase, and shall also receive and consider as bearing on the bona fides of such cost, evidence of the normal, customary, and prevailing terms and discounts in connection with other sales of a similar nature.