Chapter 21, Problem 1QS

Cost behavior identification
C1
Listed here are four series of separate costs measured at various volume levels. Examine each series and identify whether it is best described as a fixed, variable, step-wise, or curvilinear cost. (It can help to graph each cost series.)

Volume (Units)	Series 1	Series 2	Series 3	Series 4
0	1 0	1150	$ 900	$100
100	... 800 1.500	150 150	800 8OO	105
200	120
300	. 2,400	150	1,600	145
100..	3,200	150	1.500	190
500	4.000	150	2.400	250
600	4.800	150	2.400	320