A token of appreciation (but you must donate a minimum amount)

I was on mp3. So I didn't hear what the auntie with a small poster of a charity organization mumbled. She was with a bag to slot coins into (I don't know how to call it. They don't use tin cans anymore), so I reached my wallet and fished out a 50 cent coin. She mumbled again, so I took out my earpiece. A magazine of some sort, $2. So, I walked off.