Task: Question Answering
Input (English): Problem: a person lent a certain sum of money at 5 % per annum at simple interest and in 8 years the interest amounted to $ 360 less than the sum lent . what was the sum lent ? 
Options: a ) 540 , b ) 560 , c ) 580 , d ) 600 , e ) 680
Output (English): d