Following are five series of costs A through Emeasured at various volume levels. Identify each series as either fixed, variable, mixed. step-wise, or curvilinear Volume (Units) 400 300 1,200 1,600 2.00 2,480 Series A $ 3,600 7,200 10,800 14,400 18,000 21,680 Series B $ 2,500 3,100 3,700 4,300 4,900 5,500 6,100 Series C $ 6,000 6,600 7,200 8,200 9,600 13,500 Series o $1,000 1,000 2.000 2,000 3,000 3,000 4,000 Series $5,000 5,000 5,000 5,000 5,000 5,000 5,000 Servis A Series B Series C Series D Series E W Curvilinear coat Fixed cost Mixed cost Step wise cost Variable cost