I want to know just answers to a descriptive question of Q1.4.6 How does a company identify each type of cost? Can a cost classification be changed

I want to know just answers to a descriptive question of Q1.4.6

･How does a company identify each type of cost? Can a cost classification be changed over time? If yes, explain how and give an least one example. If no, explain why?

･Explain the importance of CM and how it can be used by companies to predict future income. Create some examples in excel with numbers to show how it can be used.

･Discuss the importance of these calculations to a company. Fully discuss the differences(at least 3) between the traditional vs CVP format. Give examples supported by numbers in excel of how you would use these calculations as the CFO of the company.