Task: Question Answering
Input (English): Problem: the prices of tea and coffee per kg were the same in june . in july the price of coffee shot up by 20 % and that of tea dropped by 20 % . if in july , a mixture containing equal quantities of tea and coffee costs 60 / kg . how much did a kg of coffee cost in june ? 
Options: a ) 40 , b ) 45 , c ) 50 , d ) 55 , e ) 60
Output (English): e