[based on an audio recording, walking Dongdaemun Market, Seoul, Nov. 11th 2017]
The sound of rustling, sizzling and dragging of plastic bags is not loud at all and easily goes unnoticed in the lively atmosphere of the market.
Interestingly it is present in all kinds of markets as long as actual physical objects are traded, signifying the conclusion of a deal of whatever sort.
For a performance I do not speak of the origin of the score, nor do I like it to be mentioned in the program, as I feel the knowledge of it would limit the audience's imagination.
However, the performer might be aware of it.