Task: Question Answering
Input (English): Problem: a collection of books went on sale, and 2 / 3 of them were sold for $ 3.50 each. if none of the 40 remaining books were sold, what was the total amount received for the books that were sold ?
Options: a. $ 180, b. $ 250, c. $ 260, d. $ 280, e. $ 300
Output (English): d