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1.

The following table shows a cost structure of ABC company

Marginal Quantity Average Average Marginal revenue Variable cost Total cost Cost 0 n/a n/a n/a n/a 30 1.50 3.50 6.00 1.20 60 1.50 2.50 4.00 1.00 90 1.50 2.00 3.00 1.50 120 1.50 2.20 2.50 2.50 150 1.50 2.50 3.00 4.00 180 1.50 3.50 4.00 6.00