Okla. Stat. tit. 12, § 12-3006: Summaries

The contents of voluminous writings, recordings or photographs

which cannot conveniently be examined in court may be presented in

the form of a chart, summary or calculation. The originals, or

duplicates, shall be made available for examination or copying, or

both, by other parties at a reasonable time and place. The judge

may order that they be produced in court.