The graph shows the long-run average (total) cost curve for a perfectly competitive group of manufacturers of chainsawx. Note that manufacturing firms will only stay in this market if they can compete effectively (i.e, achieve productive efficiency) and that each firm only has one plant. At an average total cost of $8 with nothing demanded at other prices, what would be the maximum and minimum number of manufacturing firms if demand was 600,000 units? minimum: firms maximum: firms