Queries :: Task List Max Tasks And Max Hours

I would like to make an action list based on tasks. I try to make a query that does the following things:

-Taken.Priority=1
-show maxium 5 tasks sorted on make date(taken.ingevoerd)
-OR with a total duration of maxium 480 minutes (Taken.[Geschatte duur (min))

The last one is to hard for me to make. For example if the duration of 4 tasks is 420 minutes, the fifth task (100 min) should not be shown, because the criteria of maximum amout of minutes is reached.This is what I have made so far:

SELECT DISTINCT TOP 5 Taken.ID, Taken.Omschrijving, Taken.Ingevoerd, Taken.Deadline, Taken.Priority, Taken.[Geschatte duur (min)]
FROM Taken
GROUP BY Taken.ID, Taken.Omschrijving, Taken.Ingevoerd, Taken.Deadline, Taken.Priority, Taken.[Geschatte duur (min)]
HAVING (((Taken.Priority)=1))
ORDER BY Taken.Ingevoerd DESC;