DOWNLOAD ALV TO EXCEL

I HAVE AN ALV REPORT,

<b>1.</b>1 FIELD IS EISBE LIKE MARC-EISBE,WHEN I DOWNLOAD TO EXCEL AND I WANT TO MAKE FUNC LIKE SUM IT IS NOT MAKE NOTHING, IF I HAVE VALUE 10 AND MAKE SUM I GET 0 ZERO <b>why?</b>

<b>2.</b> I WANT TO DOWNLOAD AND GET THE DATE IN THE EXCEL REPRORT

I USE THIS

CALL FUNCTION 'REUSE_ALV_GRID_DISPLAY'

EXPORTING

it_fieldcat = alv_fldcat

TABLES

t_outtab = <dyn_table>.

THANKS