The figure below shows graphs of the total cost function and the total revenue functions for a certain commodity. 100+ 95 90 85 80 75 70 65 60 55 50 45 40 35 30 25 20 15 10 5 -5 -4 -3 -2 -1 -5 -10- 1 2 er (a) What is the break-even point? 7 8 9 10 11 12 13 14 15 16 17 18

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