Hi everyone. This is my first time here. I actually have a little bit of difficulty for a work that I have to do... It goes like this: On the workbook, I have differents pages. In theses differents pages, I have a number on the first second and 3rd page wich is 300300 in the first colum. I'd like to get the sum of the 3 display next to the number 300300. There is an exemple:

(First page) (second page)
102120 -5689 156460 -5879
012110 -3956 254680 -4568
300300 -4564 300300 456846

So what i'd like to do is having the sum next to 300300 like this:


(First page) (second page)
102120 -5689 156460 -5879
012110 -3956 254680 -4568
300300 452282 300300 452282

The point is that I have a lot to do and I do not want to do it one by one. Any suggestion?
Thanks to all!