Put it right after the unwanted offer in your edit, then follow it with Oh My God Wow for the next reaction, and close the beat with Damn before the scene cuts away.
O tym dźwięku
This is a very short spoken clip of a voice saying 'gee, thanks' in under a second, with the emphasis landing on the thanks. It feels dry and sarcastic, like a polite reply that is not really grateful at all, and it works as a quick eye-roll in sound form for a favour nobody wanted.