want sum of the values returned by the group by query

CREATE TABLE [dbo].[1test](
        [ID] [int] NOT NULL,
        [Plan] [int] NOT NULL,
        [Year] [int] NOT NULL,
        [1] [bit] NULL,
        [2] [bit] NULL,
        [3] [bit] NULL,
        [4] [bit] NULL,
        [5] [bit] NULL,
        [6] [bit] NULL,
        [7] [bit] NULL,
        [8] [bit] NULL,
        [9] [bit] NULL,
        [10] [bit] NULL,
        [11] [bit] NULL,
        [12] [bit] NULL,
        [13] [bit] NULL,
        [14] [bit] NULL,
        [15] [bit] NULL,
        [16] [bit] NULL,
        [17] [bit] NULL,
        [18] [bit] NULL,
        [19] [bit] NULL,
        [20] [bit] NULL,
        [21] [bit] NULL,
        [22] [bit] NULL,
        [23] [bit] NULL,
        [24] [bit] NULL,
        [25] [bit] NULL,
        [26] [bit] NULL,
        [27] [bit] NULL,
        [28] [bit] NULL,
        [29] [bit] NULL,
        [30] [bit] NULL,
        [31] [bit] NULL
    ) ON [PRIMARY]


INSERT [dbo].[1test]  VALUES (237, 100, 2013, 1, 1, 1, 1, 1, 1, 0, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1, 1, 0, 0, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1,0)
INSERT [dbo].[1test]  VALUES (227, 150, 2013, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,1)
INSERT [dbo].[1test]  VALUES (257, 50, 2013, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,0)
INSERT [dbo].[1test]  VALUES (267, 200, 2013, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1,1)



SELECT
  SUM( CASE WHEN [1]=0 THEN 0 ELSE 1 END+ CASE WHEN [2]=0 THEN 0 ELSE 1 END + CASE WHEN [3]=0 THEN 0 ELSE 1 END + CASE WHEN [4]=0 THEN 0 ELSE 1 END + CASE WHEN [5]=0 THEN 0 ELSE 1 END + CASE WHEN [6]=0 THEN 0 ELSE 1 END + CASE WHEN [7]=0 THEN 0 ELSE 1 END + CASE WHEN [8]=0 THEN 0 ELSE 1 END + CASE WHEN [9]=0 THEN 0 ELSE 1 END + CASE WHEN [10]=0 THEN 0 ELSE 1 END + CASE WHEN [11]=0 THEN 0 ELSE 1 END + CASE WHEN [12]=0 THEN 0 ELSE 1 END + CASE WHEN [13]=0 THEN 0 ELSE 1 END + CASE WHEN [14]=0 THEN 0 ELSE 1 END + CASE WHEN [15]=0 THEN 0 ELSE 1 END + CASE WHEN [16]=0 THEN 0 ELSE 1 END + CASE WHEN [17]=0 THEN 0 ELSE 1 END + CASE WHEN [18]=0 THEN 0 ELSE 1 END + CASE WHEN [19]=0 THEN 0 ELSE 1 END + CASE WHEN [20]=0 THEN 0 ELSE 1 END+ CASE WHEN [21]=0 THEN 0 ELSE 1 END + CASE WHEN [22]=0 THEN 0 ELSE 1 END + CASE WHEN [23]=0 THEN 0 ELSE 1 END + CASE WHEN [24]=0 THEN 0 ELSE 1 END + CASE WHEN [25]=0 THEN 0 ELSE 1 END + CASE WHEN [26]=0 THEN 0 ELSE 1 END + CASE WHEN [27]=0 THEN 0 ELSE 1 END + CASE WHEN [28]=0 THEN 0 ELSE 1 END + CASE WHEN [29]=0 THEN 0 ELSE 1 END + CASE WHEN [30]=0 THEN 0 ELSE 1 END + CASE WHEN [31]=0 THEN 0 ELSE 1 END)*[plan] 'Count'
FROM  dbo.[1test]
GROUP BY
[plan]

the above query return the values like Count 1450 2400 4200 5000

what changes should be made so that i'll get sum of above counts means 1450+ 2400+4200+5000