Hi Grace, a non-programming solution would be to use
another column for the optional data value. Then if you
want that value to appear in the C column you can use a
conditional formula using the IF function.

In cell C5 for example, =IF(ISBLANK(D5),formulaForC,D5)

In the A column use the same type of conditional formula.

Best regards, John


-----Original Message-----
Normally column C in my workeet is an eqaution eqault
to
a minus B, where A is an equation and B is a value.
Occasionally, I have a user who wants to override the
eqaution in C with a vlaue. In that instance, he wants
to
work backwards and replace the usual eqaution for A with
A
= column B + column C.

Is there a function that will be able to tell cell A5
that
cell C5 is not an eqaution anymore but, rather, a
diectly
entered value, a value that might even be entered as
zero?

If not, is there another easy way to do this? I suppose
I
could add an extra column with a yes/no for each row, as
to whether there is an over-ride, but I would like
something simpler.

Thx,
G
.