Task: Question Answering
Input (English): Problem: company c sells a line of 25 products with an average retail price of $ 1,400. if none of these products sells for less than $ 420, and exactly 10 of the products sell for less than $ 1,000, what is the greatest possible selling price of the most expensive product ?
Options: a. 16000, b. 11400, c. 13200, d. 15400, e. 16800
Output (English): e