Finally, score in accordance with the base game rules. However, each ghost added to the meeple being scored costs you -2 points. This means that you may end up scoring negative points.

Don’t worry, you can’t go lower than 0 points on the scoring track.

Finally, return the scored meeple and any ghosts added to it to their respective supplies.

You finished the city by placing this tile. The city would normally be worth 8 points. However, 2 ghosts were added to the meeple being scored. You must subtract 4 points from your total, so this scoring only brings you 4 points.