@8cdaf679: The score for cost of living is based on a comparison of the cost of living in each city with the cost of living in New York City, which is assigned a score of 100. For example, if a city has a score of 80, it means that the cost of living in that city is 20% lower than in New York City. Similarly, if a city has a score of 120, it means that the cost of living in that city is 20% higher than in New York City.
So, in the context of the top 10 places I provided earlier, the score for cost of living indicates how expensive or affordable it is to live in each city compared to New York City.