Based on the context and the answer, generate a question. 

Context: I bet the money was so she could get a cab home after grocery shopping . Argh , having $ 50 would have been nice . But knowing I probably made a difference in someone 's week is nicer . Still , the feeling of finding an envelope full of money .

Answer:

The money was enough for both the cab home and grocery shopping .



What was the need of money ?