Deriving Fiscalquarter to Fisacl year in FOX

Hi Experts,

I have to write the FOX logic to convert the Fiscalquarter into FISACL YEAR.

The requirement is like :

When the user enters the fiscalquarter 2-(Oct 2008- Dec 2008),

So this brings the data from Oct 2007-Sep 2008 and calculate the one year data.(Background)

Is there any standard FOX code is avaialble?

if not i have planned to create the EXIT variable and i dont knoe the steps to be followed in BPS.

Is there any standard function module is available?