The four-firm concentration ratio in an industry is 75 percent.
Total sales in the industry are $800 million and total economic profit in the industry is $500 million. Normal profit for each firm is zero.
From this information we know that

Question

The four-firm concentration ratio in an industry is 75 percent. 
 Total sales in the industry are $800 million and total economic profit in the industry is $500 million. Normal profit for each firm is zero. 
 From this information we know that

Accepted Answer

total sales from the four largest firms is $600 million.

Answer

economic profit of any four firms is at least $667 million.

Answer

total sales from any four firms is at least $1,067 million.

Answer

economic profit of the four largest firms is $500 million.

Answer

economic profit of the four largest firms is $375 million.

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The four-firm concentration ratio in an industry is 75 percent. Total sales in...

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