For example, older customer groups may buy different types of products to younger groups.
It is not possible to determine how many retailers and manufacturers continue to buy other types of wet food from Menu.
These funds buy specific types of stocks.
Cui Shi's book also provides detailed instructions on which months were the most profitable times to buy and sell certain types of farm-produced goods.
Later, it bought other types of airplanes.
One caveat: Watch out for funds that buy inverse floaters and other types of derivative securities, which are financial products derived from others.
"I've been asked why I don't buy hurdling types, and the simple answer is that I just love chasers," he said.
Online book buyers buy textbooks, and sometimes other types of books, with the aim of reselling them for a profit.
However, during a financial crisis, the central bank may buy other types of financial assets as well.
Nowadays it has many stores where you can buy different types of ancient handicrafts, such as souvenirs, traditional clothes and even contemporary items.