Task: Question Answering
Input (English): Problem: a dishonest dealer claims to sell a product at its cost price. he uses a counterfeit weight which is 20 % less than the real weight. further greed overtook him and he added 40 % impurities to the product. find the net profit percentage of the dealer ?
Options: a. 94 %, b. 87.5 %, c. 55 %, d. 56.25 %, e. 36 %
Output (English): b