The first of which is the amount of money a person earns, and the other is what they choose to spend their money on. The latter is influenced by the cost of living in the city where they reside—an ever-changing metric that is driven by a wide variety of factors, such as currency, population growth, or external market movements.
Note: Report research was conducted towards the end of 2019, before the COVID-19 outbreak.

Infographic by: www.visualcapitalist.com