standard SAP Variable

Hello Experts,

Is there any SAP EXIT variable on fiscper - fiscalyear/period which sums up all the previous periods values leaving the current month.

for ex- I have values say period wise

2010007 - 2000

2011004 - 1000

2012006 - 500

2013010 - 100

2013011 -  100

2014002    500

I have display a KF value- if the user enters the period 2013011 then I need to display 2000+1000+500+100 Sum leaving the current period which user enters which is 011.2013

I need to show the closing balance till previous period in the current period under one column.

I need to show the current month balance under another column which is 100 if its 011.2013

Can any one pls advise how Can I achieve this.

Thanks,

Santhosh