Task: Question Answering
Input (English): Problem: a manufacturer sells a pair of glasses to a wholesale dealer at a profit of 18 % . the wholesaler sells the same to retailer at a profit of 20 % . the retailer in turn sells them to a customer for rs . 30.09 , there by earning a profit of 25 % . the cost price for the manufacturer is ? 
Options: a ) 33 , b ) 29 , c ) 17 , d ) 10 , e ) 16
Output (English): c