Okla. Stat. tit. 85A, § 85A-59: Computation of average weekly wages

A. 1. Compensation under this act based on the employee's

average weekly wage shall be computed by dividing the employee's

gross earnings by the number of full weeks of employment with the

employer, up to a maximum of fifty-two (52) weeks.

2. If the injured employee was working on a piece basis, the

average weekly wage shall be determined by dividing the earnings of

the employee by the number of hours required to earn the wages

during the period not to exceed fifty-two (52) weeks preceding the

week in which the accident occurred and by multiplying this hourly

wage by the number of hours in a full-time workweek in the

employment.

B. Overtime earnings are to be added to the regular weekly

wages and shall be computed by dividing the overtime earnings by the

number of weeks worked by the employee in the same employment under

the contract of hire in force at the time of the accident, not to

exceed a period of fifty-two (52) weeks preceding the accident.

C. If, because of exceptional circumstances, the average weekly

wage cannot be fairly and justly determined by the above formulas,

the Commission may determine the average weekly wage by a method

that is just and fair to all parties concerned.

D. The benefit level for members of the National Guard and any

authorized voluntary or uncompensated worker rendering services as a

firefighter, peace officer or civil defense worker shall be

determined by using the wages of the employee in his or her regular

occupation.