Research and discuss the differences between variable and fixed costs and provide examples of both and Explain the differences in ways to calculate full-time equivalents (FTEs) and explain the advantages of each. please use apa format

1. Discuss the different methods to classify cost.
2. Identify the different ways to calculate a full-time equivalent and the benefits of each.
3. Explain the process of a cost-benefit analysis and a break-even analysis and why they are important.