how to Calculate opening balance?

Y

yaqub ahmad

I have 3 tables
tblSales
invoice_no Customer_id date
001 222 12/3/04
tblSalesDetail
invoice_no product_id unit price qty
001 01 20$ 100
001 02 16$ 50

TblPayment
Invoice_no payed amount date
001 200 12/4/04
001 400 12/5/04
I want to build a report,that has the current inventory
detail and also the "oldbalance" or "opening balance"
How do I calculate "opening balance"?
Thanks.
Yaqub ahmad.
(e-mail address removed)
 
K

Ken Snell

What is the definition of "opening balance"? Show an example of its value
based on the data that you posted.
 

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