SELECT calls.created,
sum(
  CASE WHEN calls.use_call_cost = FALSE
       THEN calls."CallDuration"
  END
) / 60 * calls.cost,
-- +
-- count(
--   CASE WHEN calls.use_call_cost = TRUE
--     THEN calls.cost
--   END
-- ) * calls.cost,
calls.cost
FROM (
  SELECT
    date_trunc('day', "Timestamp") AS created,
    "CallDuration",
    CASE
    WHEN descr.use_call_cost = TRUE
      THEN descr.call_cost
    WHEN descr.use_call_cost = FALSE
      THEN descr.minute_cost
    END                            AS cost,
    use_call_cost
  FROM cdr_cdrblocked
    JOIN cdr_description descr ON cdr_cdrblocked."Description" = descr.prefix
  WHERE "CallDuration" NOTNULL
        AND is_blocked = TRUE
        AND DATE("Timestamp") BETWEEN '01.11.2017' AND '23.11.2017'
) calls
GROUP BY calls.created, calls.cost ORDER BY calls.created