OK, this will work 2 ways. You're looking for =sum(a1:a3)+sum(a1:a3)*.20

but, much easier as: =sum(a1:a3)*1.2. :-)

hth

"Shanny" wrote:

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