A concrete intermodal building unit for a prefabricated building structure including corner castings attached to contiguous rebars defining each corner of the concrete building unit. The method includes forming metal patterns on both sides of a substrate having pre-formed connection holes. Also, the driver includes one switch that is coupled across half of the series-coupled LEDs, and another switch that is coupled across the other half of the series-coupled LEDs. A controller conducts the lighting, dispensing, and reconfiguring operations for the flavor selection areas on the user interface. Similarly, a second cost index is determined based on the plurality of second cost factors associated with the second set of network elements.