(Sample for reference)

　　PART ONE
　　Dear Mr. Simon,
　　A customer complained that he had received 100 green coloured bicycles instead of 50 green and 50 blue colour bicycles ,which had been shipped on 11th May. Could you please send me the immediate invoice under contract No. TXI 2- 1 in duplicate?
　　PART TWO
　　Both Betty Fashion Shop and our shop are in city centre ,therefore ,we have almost the same customers. But there exists a fact that customers are more likely to spend their money in Betty shop. After careful research ,we notice that ,although Betty shop has higher prices ,they also have more fashionable clothes. Compared with Betty Shop, our real prices are not high, but the comparative prices to fashion are high. Therefore ,if our shop decides to increase the profits, we`should purchase highly fashionable clothes ,at least as fashionable as Betty Shop ,with the prices lower than Betty Shop's. As .customers hate increasing prices ,it is better to do this gradually.