Click on an empty cell somewhere and <copy that cell. Then highlight
all the cells with the time in them and right-click and select Paste
Special | Values (check) | Add (check) | OK then <Esc.

An alternative way is to use Data | Text-to-columns.

Hope this helps.

Pete

On Oct 23, 4:20*pm, jtucker wrote:
I export time statistics into Excel 2007 so that I can get totals for
multiple entries. *The time format is hh:mm:ss and in the hours field it adds
a leading 0. *When I set up a SUM calculation the answer is 0. *If I click on
each field first which removes the leading 0 the SUM works. *I have not found
a way to make this work other than to click on every cell before I add the
formula.