Total short time fields in query

I'm working on a project that was dropped in my lap.  It is in Access
2003.  There are short time fields which get calculated values (eg.
1:30).  But I will need to total up those values for re****ts in
qiueries.  When I tried to drop one of the fields in the query builder
and used the total function the totals was way off.

So I was wondering what would be the best way to do this?  Thanks in
advance for the help.