Economics is the study of scarcity. Scarcity exists because the society has unlimited needs and wants but the resources to satisfy these are unfortunately, not unlimited. That is why there is a certain cost to scarce things. The scarcer the thing is, the more its costs. Aside from scarcity, factors like production cost and capital affect the cost of a thing, commonly referred to as a good.
This truly depends on what case you are looking at. Personally, I would say yes, things that are BIG or BOLD are usually being expressed importantly or directly. However, in some cases, this is not how it will go.
The purpose of drawing conclusions is to READ FOR MEANING.
Reading for meaning involves understanding both the written and the implied information in a particular story. There is no way one can possibly draw correct conclusions if one doesn't understand what has been read.
Conclusions are drawn by using clues from the passage read to develop a reasonable judgement.
