I am not good at doing business My friend always reminds me that I am not good at doing business,when I try to retorte him,he will laugh at me with the stupid thing I ever did.Well,it happened in the university.Once a time I went to buy some washing powder,the seller told me it cost 1.5RMB a bag,so I asked as follow,"Can I take three bags with 5RMB?""Of course",the seller answered.After I went back to the dorm,I found I made a stupid mistake and my mind must be fevered at that time.