Task: Question Answering
Input (English): Question: A factory has a fixed cost of $42,000 a month, and a cost of $2.5 for every item produced. If the selling price of a single item is $5, what is the number of items must be sold monthly for the factory to cover its cost exactly?

 Option A: 9,000

 Option B: 14,000

 Option C: 16,800

 Option D: 22,500

 Option E: 27,000
Output (English): Option C