Please include all calculations so that I know how you got your answer! Thank you!

QS 18-1 Cost behavior identification LO C1 Listed here are four series of separate costs measured at various volume levels. Volume (Units) 0 500 1,000 1,500 Series 1 Series 2 Series 3 $ 5,000 $5,000 $ 6,000 5,000 5,000 18,500 5,000 5,000 31,000 10,000 5,000 43,500 10,000 5,000 56,000 15,000 5,000 68,500 15,000 5,000 81,000 Series 4 $ 0 15,000 30,000 45,000 60,000 75,000 90,000 2,000 2,500 3,000 Examine each series and identify whether it is best described as a fixed, variable, step-wise, or curvilinear cost. It can help to graph the cost series. Series 1 Series 2 Series 3 Series 4