I want to know what is the total cost function?

Cost Types Practice #2 Costs for 20 units Costs for 10 units Cost A per unit $ 2.00 Cost B per unit $10.00 Cost C per unit $ 3.50 Relevant Range = 0 to 50 units Cost A Cost B Cost C per unit $ 2.00 per unit $ 20.00 per unit $ 6.00 What type of cost is A, B, and C? What is the cost function of each? What is the total cost function? What is the total estimated cost of 25 units? What is the total estimated cost of 200 units