=AVERAGE(IF((A1:A200)*(A1:A20<=10),B1:B20))

as an array formula, so commit with Ctrl-Shift-Enter.

Just change the 0 and the 10 for other ranges.

--

HTH

RP
(remove nothere from the email address if mailing direct)


"Sterling" wrote in
message ...

I know just enough in Excel that I know I can get the info I want but
not enough to know how to do it. Any help would be much appreciated. I
am working with 2 columns of data, for example:

Days in Stock____________Cost

2_____________________$300
21____________________$400
117___________________$600
8_____________________$400
37____________________$500
78____________________$500

What I want to calculate is the average cost for 0-10 days in stock
(($300 + $400)/2= $350), the average cost for 11-60 days in stock, and
the average cost for 60+ days in stock.

What sort of formula would best calculate this? TIA.


--
Sterling
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