Friend, i guess the user make it a little mess, but it worked for me, so i would like to put it more clear:
Select NroCongresista,Format(Sum(TipodeMovimiento*Fecha),"Long Time") from MovimientosTable group by NroCongresista;
this, return this:
NroCongresista Expr1001
293 12:03:43 AM
294...