Cost-volume-profit analysis & tactical decision making and relevant

Provide, in your own words, a paragraph that is a minimum of four (4) sentences long for each topic below. The posting paragraph must inform or even teach the reader about the concept they found interesting in their own words.

* Cost-volume-profit (C V P) analysis.

* Using Operating Income in Cost-Volume-Profit Analysis. 

* Break even point in units.

* Short run decision making.

* Opportunity cost.

* Sunk Cost.