How SAP stores ALVs in Excel

I would like to know witch critheria makes SAP to export an ALV grid to Excel file. When I use the standar ALB button, the order of the columns is the same that in the ALV. But when I go to Menu -> List -> Export -> To excel, the excel file generated has all the ammount and quantity data in the finals columns in white color and the rest of columns are in yellow in the first columns.

My problem is that I need each quantity or amount with its corresponding unit next the value.

Thanks In Advance

Regards.