I need count row in database searching with branch and payout date in SQL Query

I have Made Query For you:

     select cast(count(custid) as varchar(5)) + custid [custid],custname,[address],mobileno,investmentdate,investmentamt,agentid,agname,payoutamt,branch,payoutdate,modeofpay
     FROM investments
     group by custid,custname,[address],mobileno,investmentdate,investmentamt,agentid,agname,payoutamt,branch,payoutdate,modeofpay