Communication networks and associated methods are disclosed that provide third party charging for SIP sessions. The retractor may have multiple body sections joined by hinges or ribs and may be rigid or flexible or some combination thereof. A conductor formed from a relatively low resistance material is formed directly on the conductive path region in a second mask count. The food supporting platform is formed as an outer frame with transversely extending spaced apart parallel bars. The internal fluid passageway is configured to limit fluid flow within the bridge fitting to a single path between the first and second ports. The trading software may track historical bid and ask information for a tradeable object.