When I create an article, it is proposed to inform the purchase cost, for example, I have a ream of paper that I buy 7€ and that I resell 11€, this is what I indicate in the article's file. So I suppose that if I enter this in the item's file, it means that this information is useful and that I will be able to display a report of all the costs in relation to the sales invoices. If I make 50 sales invoices with only this article, I will have sold 50x11€ and it will have cost me 50x7€, so I would like to display the report of these purchase costs, but I can't find the report that displays all the purchase costs (those related to the articles), is this possible? or should I create a purchase invoice of 7€ for each sale and attach it to the sales invoice? I hope not, otherwise what would be the point of entering a purchase cost in the item's file?