I want to get an average based on multiple criteria
without having to sort the records and identify the range.
Of course I can get to the average if I can get the sum.

I'm aware that I can sum records within a range that meet
a codition outside the range using the SUMIF function
"=SUMIF(Range,criteria,sum range)"

I can also count records that meet multiple criteria using
the SUMPRODUCT function
"=SUMPRODUCT((Range1=Criteria1)*(Range2=Criteria2) *
(Range3=Criteria3)"

I've also seen this array formula to count records that
meet multiple criteria:
{=SUM(IF(Range1=Criteria1,IF(Range2=Criteria2,IF
(Range3=Criteria3,1,0)))
But the SUMPRODUCT formula is easier to work with.

However, I have not found or figured out a sum formula for
multple criteria. Any help out there?
THanks
BobT