Using CASE & GROUP BY

Question

I am trying to right a query that displays a location with the numer of targets within each price range from a table I have created which looks like.
TARGET_ID        COST     LOCATION_ID 
22                6.76                1  
83               13.79               1 
256              6.71                1 
50                6.76                2 
127              13.52               2 
186              12.07               2   
8                  6.71               3 
200              17.33               3 
48                13.79               4  The code is not counting the targets in each location it just counts the targets and groups them in one location.
Can anyone explain why this is happening?
SELECT location_id,
     CASE
     WHEN  cost < 1 THEN count(target_id) ELSE 0
     END  "< 1",
     CASE 
     WHEN cost BETWEEN 1 AND 2.99 THEN count(target_id) ELSE 0
     END "1 - 2.99",
     CASE 
     WHEN cost BETWEEN 3 AND 4.99 THEN count(target_id) ELSE 0
     END "3 - 4.99",
     CASE 
     WHEN cost BETWEEN 5 AND 6.99 THEN count(target_id) ELSE 0
     END "5 - 6.99",
     CASE
     WHEN cost >7 THEN count(target_id) ELSE 0
     END ">= 7"
FROM
SELECT
          t.target_id target_id,
          SUM(ac.cost) cost,
          t.location_id location_id
     FROM
          targets t
     inner JOIN
          information i
     ON
          t.target_id=i.target_id
     LEFT OUTER JOIN
          access_cost ac
     ON
          i.security_level BETWEEN
          NVL(ac.lower_bound_level,i.security_level) AND
          NVL(ac.upper_bound_level,i.security_level)
group by
t.target_id, t.location_id
order by target_id
GROUP BY
     location_id, cost

Answer 1

Maybe I need to rap the whole thing in another SELECT statement and then GROUP BY location_id and have the SUM of each column for each location.
I trie this and I am getting an error:
SELECT loc, sum('<1') FROM (
ERROR at line 1:
ORA-01722: invalid number
SELECT   Loc,
         SUM('<1')
FROM     (SELECT   Location_Id Loc,
                   CASE
                     WHEN COST < 1 THEN COUNT(Target_Id)
                     ELSE 0
                   END "< 1",
                   CASE
                     WHEN COST BETWEEN 1
                                       AND 2.99 THEN COUNT(Target_Id)
                     ELSE 0
                   END "1 - 2.99",
                   CASE
                     WHEN COST BETWEEN 3
                                       AND 4.99 THEN COUNT(Target_Id)
                     ELSE 0
                   END "3 - 4.99",
                   CASE
                     WHEN COST BETWEEN 5
                                       AND 6.99 THEN COUNT(Target_Id)
                     ELSE 0
                   END "5 - 6.99",
                   CASE
                     WHEN COST > 7 THEN COUNT(Target_Id)
                     ELSE 0
                   END ">= 7"
          FROM     (SELECT   t.Target_Id Target_Id,
                             SUM(ac.COST) COST,
                             t.Location_Id Location_Id
                    FROM     Targets t
                             INNER JOIN Information i
                               ON t.Target_Id = i.Target_Id
                             LEFT OUTER JOIN Access_Cost ac
                               ON i.Security_Level BETWEEN Nvl(ac.Lower_Bound_Level,i.Security_Level)
                                                           AND Nvl(ac.Upper_Bound_Level,i.Security_Level)
                    GROUP BY t.Target_Id,
                             t.Location_Id
                    ORDER BY Target_Id)
          GROUP BY Location_Id,
                   COST
          ORDER BY Location_Id)
GROUP BY Loc
ORDER BY Loc