Poor buying when things expensive they are expert buying top in everything and FOMO in also the middle class are expert on buying highest prices and not just buying they buy it with credit.
Rich buys when something is with good price low price poor buys just to spend money.
Middle class behave like poor too they buying expensive.
Poor and rich behavior is not really about money, it's the type of decisions and lifestyles that people choose. On the long run poor people with a rich mindset or behavior can become rich while a rich person with a poor mentality and behavior can become poor. When it comes to buying, rich people who are prudent in spending will pay lesser because they're either buying in quantity at a reduced price. Or they're paying cash at a cheaper price than those that are buying on credit, except they're intentionally buying at expensive shopping outlets.