$2 + $2

Yesterday, I went with colleagues to ABC market for lunch. As usual, the hawker center was packed with people. While eating our lunch, we heard someone singing. It was like karaoke. Then we saw a guy pulling a black box while singing & walking slowly. His both legs are small and he has difficulty in walking. When he passed by our table, I gave him $2 and another colleague also contributed $2. He nodded few times as a sign to thank us. 

Just $2, we can easily spend it in a day without knowing it. I hope our $2 + $2 would settle a day's meals for him.