SOME HELP NEEDED

I have a program which generates a margin file for
    today's date....the program is as follows...
    
----------------------------------------------------------------------------------------
PGM    
CPYF FROMFILE(QGSJL/GFE1) TOFILE(QFLIB/YDJF1)
    MBROPT(*REPLACE) 
      CRTFILE(*YES) INCREL((*IF POFFIC *EQ '980')
(*AND
    PFIRM *EQ 'J') (*AND PEXCH *EQ '22')
      (*OR POFFIC *EQ '980') (*AND PFIRM *EQ 'J')
(*AND
    PEXCH * EQ '24')) FMTOPT(*NOCHK)        
MARG3AC P4(YDJ) P5(YDJF1)  -----> this step will
    create file YDJ.REQS
YCTAC200C REQSFILE(YDJ.REQS) POSFILE(YDJF1)
    OUTFILE(YC200)
   ENDPGM 
-----------------------------------------------------------------------------------------
    the report looks like .....
     A/C        EXCH      INITIALMARGIN(IM)
    
====================================================================
     I want to generate a report which should consist
 
    yesterday's  report(for this i will be saving
previous
    day's initial margin and pick up the data from
there
    for the report)
    
    my final report should look like below...
    
 A/C  EXCH     IM          IM      FLUCTUATION
             evious day)  (today)     
    
    
    IM stands for Initial margin...
    Fluctuation is diff btw previous day's IM and
Today's
    IM.         
    
=====================================================================
    can anyone give me some solutions how to proceed
and
    implement this in the program ,Iam stuck at the
moment
    ....My report keeps on changing daily (today?s
initial
    margin will become  previous day?s initial margin
in
    tomorrow?s report).....can anyone suggest how do i
    pick up yesterdays initial margin and change the
value
    in today's report and calculate fluctuation
    (difference btw yday's IM and today's IM)..please
    shoot me up with mails if some thing nt
    understood....awaiting for some ideas..
    Thanks in advance for ur help..
    Murali.
    
 


__________________________________
Do you Yahoo!?
Exclusive Video Premiere - Britney Spears
http://launch.yahoo.com/promos/britneyspears/