Task: Question Answering
Input (English): Problem: a club wants to mix 25 pounds of candy worth $ 8.00 per pound with candy worth $ 5.00 per pound to reduce the cost of the mixture to $ 6.00 per pound . how many pounds of the $ 5.00 per pound candy should be used ? 
Options: a ) 30 , b ) 40 , c ) 50 , d ) 60 , e ) 70
Output (English): c