A,      1       2007-01-01      2007-01-01      0,      100,    100,    0
A,      2       2008-01-01      2007-01-01      365,    110,    100,    -10
A,      3       2008-02-01      2008-01-01      31,     150,    110,    -40
A,      4       2008-02-04      2008-02-01      3,      140,    150,    10
B,      1       2008-01-03      2008-01-03      0,      200,    200,    0
B,      2       2008-02-01      2008-01-03      29,     190,    200,    10
C,      1       2008-02-03      2008-02-03      0,      10,     10,     0
C,      2       2008-02-05      2008-02-03      2,      20,     10,     -10
C,      3       2008-02-06      2008-02-05      1,      15,     20,     5