Hi. One way:

=SUM(A1:A3)*(1+20%)

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HTH :)
Dana DeLouis
Windows XP & Excel 2007


"Shanny" wrote in message
...
I have a colleague that asked help with a formula - He would like to add 3
cells up and then multiply it by 20% and add that into the total

I tried =sum(a1:a3)+(a1:a3*.20)
but it didn't work

Can this be done in one cell or do you have to use two cells to calculate
this.

thanks
Shanny