PROFIT & LOSS

     A trader marks his product 40% above its cost.  He sells the product on credit and allows 10% trade discount.  In order to ensure prompt payment, he further gives 10%, discount on the reduced price.  If he makes a profit of Rs. 67 from the transaction, then the cost price of the product is

a. Rs. 300          

b. Rs. 400       

c. Rs. 325          

d. Rs. 500