Okla. Stat. tit. 15, § 15-598.5

(a) In addition to the penalties provided in the Unfair Sales

Act, any person injured by any violation, or who shall suffer injury

from any threatened violation of the Unfair Sales Act, may maintain

an action in any court of equitable jurisdiction to prevent,

restrain or enjoin such violation or threatened violation. If in

such action a violation or threatened violation of the Unfair Sales

Act shall be established, the court shall enjoin and restrain or

otherwise prohibit, such violation or threatened violation and, in

addition thereto, shall assess in favor of the plaintiff and against

the defendant the cost of suit. In such action if damages are

alleged and proved, the plaintiff in the action, in addition to such

injunctive relief and costs of suit, shall be entitled to recover

from the defendant the actual damages sustained by him or her.

(b) In the event no injunctive relief is sought or required,

any person injured by a violation of the Unfair Sales Act may

maintain an action for damages alone in any court of general

jurisdiction, and the measure of damages in such action shall be the

same as prescribed in subsection (a) of this section. Provided the

Unfair Sales Act shall not authorize suits or actions against

newspapers, radio broadcasters, or other advertising agencies

through which such advertisements are published, broadcast or

otherwise made.

(c) Evidence of advertisement, offering to sell, or sale of

merchandise by any retailer or wholesaler at less than cost to such

retailer or wholesaler, shall be prima facie evidence of intent to

injure competitors and to destroy or substantially lessen

competition.