Okla. Stat. tit. 62, § 62-2203.6: Prices outside the ordinary channels of trade

In establishing the cost of merchandise to the retailer or

wholesaler, the invoice cost of such disaster relief materials

purchased at a forced, bankrupt, closeout sale, or other sale

outside of the ordinary channels of trade, may not be used as a

basis for justifying a price lower than one based upon the

replacement cost of the merchandise to the retailer or wholesaler,

within thirty (30) days prior to the date of sale, in the quantity

last purchased through the ordinary channels of trade.