script logic issue??

Hi All,

*WHEN FB_ACCOUNT

*IS 20100

*WHEN FB_MONTH

*IS 2013.APR

*REC(EXPRESSION = %VALUE%* 0.1119*1/12,FB_ACCOUNT=30900,FB_DATASRC=LEVELS)

*ENDWHEN

in the above logic, 20100(source) is AST type and 30900(destination) is INC type.

While i was running the evdre report, i was getting data with Negative sign.

2013.APR 2013.MAY 2013.JUN

30900 -4407.063568 -8856.430081 -13325.79297

Can anybody pls help me how logic executed and why it showing negative values??

Thanks and Regards,

Naidu