is there a way to get the sum of figures per page on the data report designer

e.g.

DATA REPORT HEADER (PAGE 1)
=================
item1 1.00
item2 2.00
item3 3.00

Page Total 6.00----> how do i do this?

DATA REPORT HEADER (PAGE 2-LAST PAGE)
================
item4 4.00
item5 5.00
item6 6.00

Grand Total 21.00 --> taken care of by sum function (report footer)


i cant use a sum function on the page footer since data report designer does not allow you to do so..