If an Industry Has 25 Firms That Collectively Have $150

Multiple Choice

If an industry has 25 firms that collectively have $150 million in total sales and the top three firms in this industry account for $78 million in sales and the fifth through twenty-fifth firms account for $60 million in sales, what is the amount of sales for the fourth largest firm?

A) $12 million
B) $6 million
C) $18 million
D) none of the above