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　　BEC高级精讲班第11讲讲义
　　Homework review
　　I. Homework review
　　 1.
　　In 1996, the sales showed a general downward trend. British shoppers spent about 9% on Monday. Then the spending rose considerably on Tuesday and increased slightly to about 14% on Wednesday followed by a small drop on Thursday. It shot up again on Friday and peaked at approximately 22% on Saturday before collapsing at below 5% on Sunday.
　　In contrast, there was a general upward trend in the spending at all retailers in Britain in 2000. Although the spending started at about 7% on Monday, a noticeable lower volume than in 1996, it grew sharply on Tuesday to about 12%. Since then, there was a steady increase until Friday. On Friday, it reached the peak at about 19% while the sales afterwards decreased gradually to about 18%, well up that in 1996.
　　2.
　　The bar chart illustrates three different photocopiers, Carda, KD and Sebu according to their purchase price, the warranty cost and their expected running costs for the first two years.
　　In terms of the purchase price, Sebu is the most expensive one priced at about $1000 while Carda only costs $600 and KD at $750.
　　In respect of the warranty cost, Sebu is the cheapest one at about only $100. On the other hand, KD costs $200 and Carda at $150.
　　One pays the least for the running costs of Sebu at $750 whereas Carda has the highest ones of $1200 and KD at $800.
　　To sum up, the expected total costs for the initial 2-year period for the Carda, KD and Sebu are $1900, $1800 and $1800 respectively.
　　(127 words)

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