To Mr. Nages : Xbrowse Footers Total with Time string

[Eoeo]

I have a xbrowse with many records with Time strng as "06:04" = 06Hours 04Minutes
and I wish insert on footer the total of each columns




oBrw:acols[2]:cfooter:= ????

For now I can resolve with another hide field "tot_secs" with the calc of each time into nseconds but I think it is not the good solution!!

I have many columns as "Time" and I Know the calc is too hard

[Eoeo]

Any solution ?