Some firms are manufacturing firms. What other types of companies are there?

$6.$ If costs are classified by behavior, name two categories of costs.

$7.$ When making a decision, it is important to consider $$relevant costs.$$ What, specifically, makes a cost relevant to a decision?

$8.$ What does it mean to be a professional? That is$,$ what kinds of attributes$/$characteristics$,$ attitudes, and actions do you expect of a professional?