Nothing could be simpler, Bill. If you have them recorded in Excel's notion
of time, ie if they're displayed using one of the time formats like "[h]:mm",
then you can simply sum them up. If the sum shows up looking like a date (eg
"January 13, 1900, 09:02"), then just change the sum cell's format to
"[h]:mm".

If you have these hours and minutes stored as (for example) "13" in col E
and "25" in col F to indicate 13:25 (13 hours and 25 minutes), then in col G
or wherever you'll need to convert these values to Excel-internal time; just
use =(E2+F2/60)/24. That gets you each row's time as expressed in fractions
of a day (which is how Excel does it); then format these cells to show hours
and minutes properly and sum the resulting column.

--- "bill" wrote:
During the year I kept a log of the hours and minutes spent daily on a
project. Now the tax man want me to post it in hours and minutes per week. I
have Excel 2000 and I would like to add up the total number of hours spent in
each week.