Super glitch

Guys I found a super glitch (100% works no edit)
The glitch is to get max. number of shoes(From the garbage quest guy)

1. Collect all the elements
2. Buy your gift
3. Then close the gift window
4. Again open buy gift the close the window.

Open.Buy gift. Close. Open...
The number of times you do the number of shoes you get. Here is the proof:-