Sum of previous page's "field"

[Massoud]

Hi experts,

In my financial reports and regarding a special "field" three things are very important:

1- sum of the field at the end of each page (which I think I know)
2-sum of the field at the end of the form (which I believe I know)
3- at the beginning of each page the sum of the previous page should be shown ( this I don't know at all)

So please kindly guide me in all three (regardless of my thoughts and beliefs)

Thanks again for the help
Massoud