Sandy

<snip

There may be someone alone any minute to contradict the above but I would do
it with an Even(sic) Macro.

<more snip

I don't think you'll get any argument in favor of using a cell as an accumulator
cell.

Following is my standard post on this subject.

You can have a cumulative total in a cell if you have a
separate source cell for adding a new total to the original.

Use at your own risk. I am Posting this just to show you how it can
be done, not as a good solution. You would be much better off to
have another column so you can keep track of past entries.

Goes like this: =IF(CELL("address")="$C$4",C4+D4,D4)

Enter this in cell D4 and then in ToolsOptionsCalculation check
Iterations and set to 1.

Now when you change the number in C4, D4 will accumulate.

Note 1. If C4 is selected and a calculation takes place anywhere in
the Application D4 will update even if no new number is entered in
C4. NOT GOOD.

Note 2. This operation is not recommended because you will have no
"paper trail" to follow. Any mistake in entering a new number in C4
cannot be corrected. NOT GOOD.

To clear out the accumulated total in D4 and start over, select D4
and EditEnter.

Check out Laurent Longre's MoreFunc.xla. Has a Function RECALL
which does what you want without the re-calculation problem, but
again there is no "paper trail" for back-checking in case of errors
in data input.

http://longre.free.fr/english/func_cats.htm

Also see John McGimpsey's site for VBA method and the same caveats as above.

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


Gord Dibben Excel MVP