a trailing grand summary will print on the final page...
If the report combines three receipts and you want a subtotal at the end of each receipt, create a Subsummary section when sorted by receipt number.
If you want a total for the page, add a footer and put the summary field in the footer. It should show the sum for the page.... I think, have to test this.
Haven't tried this, but if you know the number of items that will fit on a page, you could create a calculated field in the details (example assumes lines per page = 15) :
pageno = truncate ( get ( recordnumber ) / 15 )
The create a summary field to total line item value when sorted by pageno and restart for each group