Based on the graph: the amount of output produced by this firm when it achieves productive efficiency is _____________ A graph showing three U-shaped cost curves: MC, AVC, and ATC. MC is at the minimum of $1.50 when the output is 3000 units. AVC is at the minimum of $4 when the output is 5500 units. ATC is at the minimum of $5.50 when the output is 6000 units. Alternate Text: A graph showing three U-shaped cost curves: MC, AVC, and ATC. MC is at the minimum of $1.50 when the output is 3000 units. AVC is at the minimum of $4 when the output is 5500 units. ATC is at the minimum of $5.50 when the output is 6000 units. Group of answer choices 5000 units 6000 units 5500 units 3000 units