Try

=AVERAGE(IF(period_range0,IF(period_range<4,IF(lo cation_range="xxx",percent_range))))

confirmed with CTRL+SHIFT+ENTER

this calculates average % for location "xxx" in first 3 periods (quarter 1)

Note ranges should all be the same size and not whole columns

"sahafi" wrote:

My data is like this:

Columns: (Year), (Period), (Week), (Location),(...),...,(Calculated field %).

Each period has 4 weeks. I have about 30 locations and each location has one
occurance of %number for each week. I need to calculate an average per
location per quarter. Quarter (Q) = 3 periods (but my data doesn't have any
listing by quarter). I have tried sumproduct but it will calculate all the %s
for a given location throughout the year. I only need to show the Avg % for
each location between p1 wk1 through p3 wk4, then from p4 wk1 through p6 wk4,
and so forth.
Any direction on this is greatly appreciated.

Thanks.
--
when u change the way u look @ things, the things u look at change.