How do you add a value with in a singel cell. When I try say working with cell L12 and I want to add cell L11 plus add a new value to L12,how is this done. When I try Sum(L11+L12) and hit the check mark I get a error. I am trying to add weekly values to a running monthly value in a single cell. Thanks for any help. Richard

Or to simply add two cells:
=L11+L12

When you type the '='-symbol, simply select the cells you wanna add and hit the enter-button.

This works for excel2000, but i dont think it will differ in XP.

Good luck,

Niels.

P.S. Actually this is a question for the computer-help-forum and not the HTML-forum ;-)