Task: Question Answering
Input (English): Problem: a bookseller sells his books at a 20 % markup in price . if he sells a book for $ 36.00 , how much did he pay for it ? 
Options: a ) $ 34.40 , b ) $ 34.00 , c ) $ 32.00 , d ) $ 30.00 , e ) $ 35.00
Output (English): d