Task: Question Answering
Input (English): Problem: i bought two books; for rs. 500. i sold one at a loss of 15 % and other at a gain of 19 % and then i found each book was sold at the same price. find the cost of the book sold at a loss ?
Options: a. 337, b. 280, c. 299.67, d. 266.67, e. 291.67
Output (English): e