Disclosed is an electric junction box dissipating heat generated by a bus bar toward components. The liquid fuel mixer includes a casing, one or more radiators and a gas permeable but liquid impermeable film. The thermal conduction medium is a composite sheet having a thermal conductivity which is greater in a planar direction of the composite sheet than the thermal conductivity in a thickness direction of the composite sheet. The tubular dome can be between the upper bumper transition and the finish and can has a cross sectional shape that is substantially the same throughout. If the credit limit of any leg in the selected optimal credit path is exceeded, then the system will repeatedly try to find viable credit path based on the preferences specified by the credit entities involved in the trade, until a viable credit path is found or it is determined that no credit path that can accommodate the proposed deal without exceeding a credit limit currently exists.