<s>[INST] I joined a steady group that plans every Friday evening. We are doing a trip to New Haven, Connecticut, and would like to share the expenses properly. Since the trip will take a few hours and some of us may have different income levels or financial priorities, we are thinking about how to split the expenses so that everyone can participate fairly. What are some organic, ROI-styles right, and scenario-based methods to split the trip expenses?[/INST]