I have the following on a parent sheet

A B C
1 05/01/09 5 8
2 05/02/09 7 7
3 05/03/09 6 8
4

B & C can be updated through out the day and I want to log those changes
automaticely.

Can excel save those changes in a log form on another worksheet when one
saves the workbook? Is this like an index and dynamic process? Not all that
smart with excel.

Can I