First of thanks a lot.
This means that I have to make the calculation of :
=C170*$D$1+D170
in one cell say C180
and do this for all the other sheets.
I thoough it can be done automaticaly without having the answer on the same
sheet.
Note:
I have othe sheets n the work book that are not included in the equation
Khalil
my suggestion assumes that the sheets you want to sum are together.
1,2,3,4,5,6,7,8,9,10,11,12,13,14
you could use=sum(sheet2:sheet13!a1)
if some other configuration, I guess you will have to do it the other way.

Signature
Don Guillett
SalesAid Software
dguillett1@austin.rr.com
> First of thanks a lot.
> This means that I have to make the calculation of :
[quoted text clipped - 37 lines]
>>>
>>> Thank in advance