Lakme — No price list in your product

I have brought a Lakeme nail polis from Meerit Queen at Asansol, WB. But there is no price on the product.The price is taken Rs.92. But the shopkeeper said it's real value is Rs. 100. We give 8% discount . How it is possible? I do not know what the real price of that product. Kindly print the price on the any product for any suspect about the company. Please do the needful. Thanking You Arun Sarkar