I want to buy a rain coat . Could you please show me one ?   With pleasure . What color do you like ?   I like yellow best . How much does it cost ?   It costs 275 yuan , Miss .   It's nice , but that's very steep for a rain coat . Could you give me a 20 percent discount ?   Sorry , we don't give discounts .   In that case , I don't think I'll buy one here . 