How Many Table Do I Need To Do The Following


Num...Customer.....Goods_Sold.....Quantity.....Serial_Number

example

Num.....Customer....Goods_Sold....Quantity....Serial_Number
==============================================

1..............ALI ........CD ROM ............4 ..........6541
.................................................................9879
.................................................................8989
.................................................................3200
...........................Floppy Drive .......1 ..........8989A0
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Note That a Customer May Have Many Products Purchased
Note That The Serials Depend on Quantity , Each Product Has A Serial

How Many Tables Do I need To Design This Invoice?
Thx.