Exercise 21-1 Cost behavior in graphs C19 0 Following are five graphs representing various cost behaviors. (1) Identify whether the cost behavior in each graph is mixed, step- wise, fixed, variable, or curvilinear. (2) Identify the graph (by number) that best illustrates each cost behavior: (a) Factory policy requires one supervisor for every 30 factory workers: (b) real estate taxes on factory: (c) electricity charge that includes the standard monthly charge plus a charge for each kilowatt hour; (d) commissions to salespersons, and (e) costs of hourly paid workers that provide substantial gains in efficiency when a few workers are added but gradually smaller gains in efficiency when more workers are added. Costs Costs Costs Costs Volume Volume Volume Volume Volume