Dreaming about financial transactions, such as asking someone to pay for a sandwich or requesting money to be sent to your bank accounts, can reflect your current feelings about money, support, and relationships. Here are some possible interpretations:

1. Financial Concerns: This dream might indicate that you are feeling anxious about your financial situation or are seeking more stability in your financial life. It can be a reflection of your waking concerns about money and how it influences your relationships.
2. Support and Reciprocity: Asking someone to pay for a sandwich could symbolize a desire for reciprocity in your relationships. You may be feeling that you give a lot to others and are looking for a balance where others also contribute or support you.
3. Value and Worth: The act of requesting payments may suggest that you are evaluating your self-worth or the worth of your contributions in certain areas of your life. It might be a prompt to consider how you value yourself and whether you feel appreciated by those around you.
4. Communication and Boundaries: This dream could indicate a need to communicate your needs more clearly to others. It might be highlighting the importance of setting boundaries regarding what you are willing to give and what you expect in return.

Reflect on your current financial situation and your relationships with those around you. It could be helpful to consider whether there are areas where you feel underappreciated or where you need to speak up about your needs.