Add value to a count from another count

Transact-SQL
1

Is it possible to add a value to a count from another count, if so how?

I want to add the value from count(case when NF = '1' then 1 else null end) as NF to count(id) AS [entries]

        Dim MyDataAdapter As New SqlDataAdapter("SELECT Klass, " &
        "count(case when Grupp = 'A' then 1 else null end) as A, " &
        "count(case when Grupp = 'B' then 1 else null end) as B, " &
        "count(case when Grupp = 'C' then 1 else null end) as C, " &
        "count(DISTINCT Tävlingens_namn) AS [races], " &
        "count(id) AS [entries], " &
        "count(case when NF = '1' then 1 else null end) as NF, " &
        "count(Sluttid) AS [finished], " &
        "count(DISTINCT Arrangör) AS [arr], " &
        "count(FIDnr) AS [totfid] " &
        "FROM resultat " &
        "Where Stil = @Stil " &
        "AND Datum BETWEEN @startdate AND @enddate " &
        "GROUP BY Klass Order By Klass", MyConnection)