average weekly hours
(2) The average weekly hours or average workweek of the full-time employees so employed during such annual period shall mean the number of hours obtained by the following computation: (i) All the hours worked during such annual period by all the full-time employees regularly employed under the plan shall be totaled; (ii) the number of workweeks worked by each such employee during such annual period under such plan shall be computed, and the totals added together; and (iii) the average weekly hours, taken in the aggregate, of all such employees shall be computed by dividing the sum resulting from computation (i) by the sum resulting from computation (ii).