Hi Susan,

Am Fri, 8 Mar 2013 05:32:15 -0800 (PST) schrieb Susan:

=(SUM($A$3:$E$10000)/(SUM(A3:A10000)))

try:
=SUM(A3:A10000)/SUM($A$3:$E$10000)


Regards
Claus Busch
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Win XP PRof SP2 / Vista Ultimate SP2
Office 2003 SP2 /2007 Ultimate SP2