Task: Question Answering
Input (English): Problem: when sold at a 70 % discount, a sweater nets the merchant a 40 % profit on the wholesale cost at which he initially purchased the item. by what % is the sweater marked up from wholesale at its normal retail price ?
Options: a. 20 %, b. 40 %, c. 50 %, d. 60 %, e. 78.58 %
Output (English): e