It is not really recommended to do this as you have no history and can't
track errors but have a look at

http://www.mcgimpsey.com/excel/accumulator.html

Regards
Rowan

"ahemani" wrote:

Can excel automatically add together a new value that is typed into a cell
that already had a value in it. For example if B10 had a value of 55 in it
and you typed in the number 5 in that cell, it would automatically display 60
as the new value in that cell ?