How do the sources of income differ depending on where one is situated in the social class hierarchy?

according to sociologist there are six social classes in America and those social classes can be classified as follows:

The Upper class which comprises only few of the Americans.

The upper class is further divided into 2 subclasses based on their salary per year.

The upper-upper class earns about hundreds of millions to billions of dollars per year

The lower-upper class earns about millions yearly .

Then comes the middle class which makes up almost 40% of the population according to sociologist, it also subdivided into upper-middle class who earns about 76,000 dollars or more annually and it is about 14%of the population out of the 40% of the middle class group.

Another subdivision from this class is the lower-middle class who makes up 26 %of the population from the 40% and they earn 46,000 to 75,000 dollars.

The other social class is the working class which makes up about (30%) of the American population who earns $19,000 to $45,000.

The lower class (27%) is divided into the working poor (13%, earning $9000 to $18,000) and the underclass (14%, earning under $9000).

This classification is based on economical factors excluding educational factors and types of status attached to individual's occupations

Explanation:

the minoan civilization flourished in the middle bronze age on the island of crete located in the eastern mediterranean from c. 2000 bce until c. 1500 bce. with their unique art and architecture, and the spread of their ideas through contact with other cultures across the aegean, the minoans made a significant contribution to the development of western european civilization as it is known today. labyrinth-like palace complexes, vivid frescoes depicting scenes such as bull-leaping and processions, fine gold jewelry, elegant stone vases, and pottery with vibrant decorations of marine life are all particular features of minoan crete.  

so basically their unique way of ding arts, as well as architecture.