SELECT  src,dst ,
CASE billsec % 6
  WHEN 0 THEN ((( (billsec/6) *6)::float(1)/60)::float(1))::float(1)
  ELSE        ((( ((billsec/6 +1)* 6))::float(1)/60)::float(1))::float(1)
END as minutes
,accountcode,
CASE accountcode
  WHEN 'INTRA' THEN .035
  ELSE .025
END as RATE,
CASE accountcode
  WHEN 'INTRA' THEN
    CASE billsec % 6
      WHEN 0 THEN ((( (billsec/6) *6)::float(1)/60)::float(1)*.035)::float(1)
      ELSE        ((( ((billsec/6 +1)* 6))::float(1)/60)::float(1)*.035)::float(1)
    END
 ELSE 
    CASE billsec % 6
      WHEN 0 THEN ((( (billsec/6) *6)::float(1)/60)::float(1)*.025)::float(1)
      ELSE        ((( ((billsec/6 +1)* 6))::float(1)/60)::float(1)*.025)::float(1)
    END
END as amount
FROM "public".cdr 
WHERE calldate >= '11/01/2004' and calldate < '12/01/2004'
and billsec > 0
and (src like '843%')
order by dst;