I don't know the specifics of that differential or what the base is of that report citing the difference in costs.
In terms of costs, what we charge is contractual. That's an agreement we arrive at with our suppliers, in advance of their products being listed with us. It's customary in terms of how we're operating. We have a fairly equitable process to evaluate whether our relationship with the supplier is balanced. I gave an example of that in terms of how we gauge cost increases, because that's a fundamental interaction we have with the suppliers. We have processes in place to make sure that relationship remains balanced, because they are key partners in our business.