Explain the importance of identifying categorizing costs and the costs behavior

Complete each of the following items:A. Explain the importance of identifying & categorizing costs and the costs behavior.B. Explain the relevance of cost objects, cost pools, and cost drivers in the practical application of cost to activities.C. How do we allocate cost? Why do we allocate cost?D. Explain how the variable costing income statement can be used to understand operational performance and risk.