php - Doctrine add columns from a subquery -

i have following code in sql:

    select id, sum(horas) horas , sum(custo) custo from(     select mr.name, mr.id id, sum(hour(timediff(m.end, m.start))) horas, sum(hour(timediff(m.end, m.start))) * u.cost_hour custo     meeting m     inner join meeting_join_rooms on m.id = meeting_join_rooms.meeting_id     inner join meeting_rooms mr on meeting_join_rooms.meeting_room_id = mr.id     inner join meeting_attendee ma on ma.meeting_id = m.id     inner join users u on u.id = ma.user_id      m.cancel = false     , m.ismaster = false     group mr.name, u.id ) subquery group name 

i've converted code doctrine using following query builder:

$subquery = $this->getentitymanager()             ->createquerybuilder()             ->select(' mr.name name, sum(hour(timediff(m.end, m.start))) hours, sum(hour(timediff(m.end, m.start))) * users.costhour cost')             ->from('appbundle:meeting','m')             ->join('m.meetingrooms', 'mr')             ->join('m.participantusers', 'ma')             ->join('ma.user_id', 'users')             ->join('users.groups', 'gu')             ->where('m.cancel = false')             ->andwhere('m.ismaster=false');  $totalhoursandcost = $this->getentitymanager()->createquerybuilder()             ->select('sum(hours) y, sum(cost) totalcost')             ->from( '## $subquery here ##')             ->groupby('name')->getquery()             ->getresult(); 

how sum columns result subquery in doctrine?