Subtotal in gridview

Question

how i want to make sure that my footer is appear in the right place?

example:
my pages appear like this.


Number   Name  Bil        Date
1            Am's   100       2/2/2012
2            Mat     200       3/2/2012
                                                  Total Amount      300.




to below:






Number   Name  Bil       Date
1            Am's   100     2/2/2012
2            Mat     200       3/2/2012
                   Total Amount     300.





How i want to make sure Total Amount is under Name and Total Bil (300) in the footer of Bil