example purchasing database?

[davy]

Dear All,

Is there an example purchasing database to download?

I need to store purchase price for widget, A,B,C etc from supplier
X,Y,Z etc and then for a query to calculate the best price for widget
A and which supplier X,Y,Z to use.

Of course I will need to add extra suppliers so I need to calculate
the best price for widget A when there is a greater choice of
suppliers.

Thanks for any pointers

Davy R