Customer exit code to calculate Average YTD.

Question

Hi Experts,
I want to create new column ( AVGYTD TRGT) in Bex report for folling data .( Which is FF data).
I have created one formula variable(zfmvavgytd) of type customer exit. and strucked at coding part.
so that, anybody provide customer exit code for required column(avgytd trgt). and details are as follows.
0CALMONTH  ENO  ENAME  PERDAY_ TRGT  
04.2011             1     ABC             100                     
04.2011             2     BCD             200
05.2011             1     ABC             200 
05.2011             2     BCD             200 
06.2011             1     ABC             300 
06.2011             2     BCD             200 
07.2011             1     ABC             200
07.2011             2     BCD             200 
till  03.2012        
Now I want to display the column for ( AVG YTD_TRGT)   based on "0calmonth " & " ENo  "   as below
AVG YTD_TRGT
100           
200
150
200
200
200
200
200
calculation behind this is...
for 04 .2011   --empno(1)  ---100/1
for 04 .2011   --empno(2)  ---200/1
for 05 .2011   --empno(1)  ---200+100/2
for 05 .2011   --empno(1)  ---200+200/2
for 06 .2011   --empno(1)  ---300200100/3
for 06 .2011   --empno(1)  ---200200200/3
for 07 .2011   --empno(1)  ---200300200+100/4
for 07 .2011   --empno(1)  ---200200200+200/4

Answer 1

First you need to calcualte the YTD and then Average YTD.
Year to Date (YTD) u2013 From the 1st to entered u201CKey Dateu201D for the current year.
Average Year to Date - YTD divided by the u201CNo of Daysu201D in year till u201CKey Dateu201D for current year.
Check the below code for getting Previous YTD....next create a Selection restrict the KF with YTD varaible
Below is sample code for reference.
to calculate "Previous year to date" (User input Calday u2013 key date)
WHEN 'ZDAYPYR'.
IF I_STEP = 2. "after the popup
LOOP AT I_T_VAR_RANGE INTO LOC_VAR_RANGE
WHERE VNAM = 'ZPDATE'.
CLEAR L_S_RANGE.
L_S_RANGE-LOW = LOC_VAR_RANGE-LOW.
L_S_RANGE-LOW(4) = L_S_RANGE-LOW(4) - 1. "low value previos year
v_loc_date = L_S_RANGE-LOW. "take input value in another variable
L_S_RANGE-LOW+4(4) = '0101'.
L_S_RANGE-HIGH = v_loc_date. "high value = input, taken into another variable
L_S_RANGE-SIGN = 'I'.
L_S_RANGE-OPT = 'BT'.
APPEND L_S_RANGE TO E_T_RANGE.
EXIT.
ENDLOOP.
ENDIF.