Form to show Sum of detail lines

See attached.
Click form frmMainBig.

This shows a single customer (tblCustomers) who is buying 3 products (tblQuoteDetails - see the green bits).

Specifically, note the "line value" in green.

Now look at the orange field at the bottom of the subform.
I want the orange to show the sum of the "line values".

i.e. the Orange should show the sum of the green "line value"
I have tried various options but am unsure of my approach.

All help appreciated!  I hope this is clear.
Database11.zip
Patrick O'DeaAsked:
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Jim Dettman (Microsoft MVP/ EE MVE)Connect With a Mentor President / OwnerCommented:
In your subform, frmQuoteDetails, place a text control in the forms footer.

  Call it txtLineTotal.  Set it's controlsource to:

 =Sum([qty]*[PriceAfterDiscount])

 Now in the main form, set the controlsource for XXSumOrderValue to:

 =Forms![frmMainBig]![frmQuoteDetails].Form![txtLineTotal]

JimD.

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Jim Dettman (Microsoft MVP/ EE MVE)President / OwnerCommented:

 BTW, the text control in the subform can be hidden.

JimD.
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Jim Dettman (Microsoft MVP/ EE MVE)President / OwnerCommented:
Slight correct; the text control in the subform footer needs its controlsource to be:

=Sum([Qty]*([sellprice]*(1-[DiscountPercent])))

JimD.
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Patrick O'DeaAuthor Commented:
perfect !

Thankyou!
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