I need to know if there is a way to create a formula that will allow me to
enter multiple values in a cell at different times and this formula will sum
there values.
Example:
I would enter 10 in cell B3.
An hour later I might enter 25 also in cell B3.
After the second entry I would want it to automaticaly display 35.

Is this possible and how would it be done?

Thanks for your help.