Count records from Access Query

I currently have an access database with a query that I need to tweak.  The existing query is:

SELECT ssUsers.custom1 AS Location, Sum(DateDiff("d",[CheckIn],[CheckOut])*[rooms]) AS ActualRoomNights, Sum(reservations.revenue) AS TotalRevenue, [TotalRevenue]/[ActualRoomNights] AS ADR, Sum(DateDiff("d",[effectiveCheckIn],[effectiveCheckOut])*[rooms]) AS EffectiveRoomNights, [ADR]*[EffectiveRoomNights] AS EffectiveRevenue, Sum(([revenue]/(DateDiff("d",[CheckIn],[CheckOut])*[rooms]))*(DateDiff("d",[effectiveCheckIn],[effectiveCheckOut])*[rooms])) AS EffectiveRevenueReal, ssUsers.Custom3 AS Team, ssUsers.custom2 AS RDO, reservations.ressource
FROM reservations INNER JOIN ssUsers ON reservations.ssUserID = ssUsers.ssUserID
GROUP BY ssUsers.custom1, ssUsers.Custom3, ssUsers.custom2, reservations.ressource;

I call to the query in an asp page like this:

SQL = "SELECT Location, ActualRoomNights, TotalRevenue, ADR, EffectiveRoomNights, EffectiveRevenueReal, Team, ressource From vwResults4 WHERE EffectiveRevenueReal <> 0 AND ADR > 19 AND ressource = 0 ORDER By EffectiveRoomNights DESC"
 
This worked well when I needed to display records by EffectiveRoomNights.  However, instead of ordering by EffectiveRoomNights, I now want to sum the number of records where ressource =0 by Location and sort Locations in Descending order.  For example, if I have two locations, Location1 and Location2, and Location1 has five different records where ressrouce=0, and Location2 has 4 different records where ressource=0, then I would display Location, ActualRoomNights, TotalRevenue, ADR, EffectiveRoomNights, EffectiveRevenueReal, Team, and total records where ressource=0 for Location1 then Location2.