Place it at the very end of an edit, after the last joke or failed attempt, so it acts as the final cutoff. Pair a SpongeBob Fail moment just before it for a messy exit, then let the announcement close the scene without adding another effect after it.
About this sound
This is a short, flat public-address announcement telling shoppers the store has closed and they should leave the building. The formal, matter-of-fact voice sounds exactly like a real loudspeaker message, which makes the familiar wording feel both abrupt and funny outside a shop. It works as a deadpan cutoff, giving a listener the sense that time is up and the conversation is finished.