Code :
REPORT ZVP_ALV_DO_SUM.

TYPE-POOLS: SLIS.

TYPES: BEGIN OF EMP,
         ID   TYPE CHAR10,
         NAME TYPE CHAR10,
         SAL TYPE INT4,
       END OF EMP.

DATA: IT_EMP    TYPE STANDARD TABLE OF EMP,
      WA_EMP    TYPE EMP,

      IT_FCAT   TYPE SLIS_T_FIELDCAT_ALV,
      WA_FCAT   TYPE SLIS_FIELDCAT_ALV,
      WA_LAYOUT TYPE SLIS_LAYOUT_ALV.


WA_EMP-ID = '1'.
WA_EMP-NAME = 'SANJIT'.
WA_EMP-SAL = '25000'.
APPEND WA_EMP TO IT_EMP.
CLEAR WA_EMP.

WA_EMP-ID = '2'.
WA_EMP-NAME = 'RAJU'.
WA_EMP-SAL = '20000'.
APPEND WA_EMP TO IT_EMP.
CLEAR WA_EMP.

WA_EMP-ID = '3'.
WA_EMP-NAME = 'GANESH'.
WA_EMP-SAL = '35000'.
APPEND WA_EMP TO IT_EMP.
CLEAR WA_EMP.

WA_EMP-ID = '4'.
WA_EMP-NAME = 'SUVANKAR'.
WA_EMP-SAL = '23000'.
APPEND WA_EMP TO IT_EMP.
CLEAR WA_EMP.

WA_EMP-ID = '5'.
WA_EMP-NAME = 'KAJOL'.
WA_EMP-SAL = '18000'.
APPEND WA_EMP TO IT_EMP.
CLEAR WA_EMP.


WA_FCAT-COL_POS = '1'.
WA_FCAT-FIELDNAME = 'ID'.
WA_FCAT-SELTEXT_M = 'USER ID'.
APPEND WA_FCAT TO IT_FCAT.

WA_FCAT-COL_POS = '2'.
WA_FCAT-FIELDNAME = 'NAME'.
WA_FCAT-SELTEXT_M = 'CUSTOMER NAME'.
APPEND WA_FCAT TO IT_FCAT.

WA_FCAT-COL_POS = '3'.
WA_FCAT-FIELDNAME = 'SAL'.
WA_FCAT-SELTEXT_M = 'CUSTOMER SALARY'.
WA_FCAT-DO_SUM = 'X'.
APPEND WA_FCAT TO IT_FCAT.

WA_LAYOUT-COLWIDTH_OPTIMIZE = 'X'.

CALL FUNCTION 'REUSE_ALV_GRID_DISPLAY'
  EXPORTING
    IS_LAYOUT     = WA_LAYOUT
    IT_FIELDCAT   = IT_FCAT
  TABLES
    T_OUTTAB      = IT_EMP.

Output :



IDE Used To Test This Code : SAP gui.

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