I have configured tarrifs and my reports now show accurate costs, except that costs are being assigned to incoming calls as well as outgoing calls. In my specific instance, most incoming calls incur no costs, so I would like the reports to reflect this. For some of my clients who receive incoming calls to toll free numbers, they might require different costs then on outgoing calls, and only for incoming calls on specific lines or to specifric DNIS numbers. Can this be done?