Task: Question Answering
Input (English): Problem: a bookseller sells his books at a 25 % markup in price . if he sells a book for $ 12.5 , how much did he pay for it ? 
Options: a ) $ 14.40 , b ) $ 14.00 , c ) $ 11.00 , d ) $ 9.60 , e ) $ 10.00
Output (English): e