#114 store product.buyprice in ticketline attributes

[Bennye]

Is it possible to have the product buyprice stored in the ticketlines.attributes, just like other product fields currently there, This will allow us to write profit reports. As you then can get the difference between the ticketline selling price and the buy price at the time the ticketline was created. It's of no use to take the buyprice from the product as that changes over time.

Regards
Ben