What are the differences between low-order, middle order, and high order goods and services.?

For the answer to the question above, well I think b asically the high order goods can be classified as luxury items. for example television, air conditioners, cars and laptops and etc.,

Low order goods are things such as newspapers, groceries etc. which cost very little compared to the first examples.

I'm not that sure about the medium order but I think it could be things in between such as clothes or lamps. There can be a lot of variation in these though like clothes bought from Lacoste and clothes bought from Old Navy have a large difference in price.