Paraphrasing (21st paragraph)

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Recently Dell has shifted much of its sales to the internet and these sales have risen to more than $30 million a day. Purchases made on the Internet have substantially higher margins and reduced costs. Customers make fewer telephone calls (one call, as opposed to five). The original call centre sales model also was limited due to the cost (in time) of providing information to customers. Sales staff have incentives to maximize the margin dollars earned per minute of contact time. They will thus act to conclude a sale with a choice that may not reflect the customer’s willingness to pay for higher margin components. On the Internet, the indecisive customer can surf without limit and may end up buying a more expensive configuration.

The main idea of the paragraph

Recently Dell has shifted much of its sales to the Internet, because purchases made on the Internet have reduced costs, including the cost in time of providing information to customers and have substantially higher margin.

最近,戴尔公司把其大部分的销售移到了互联网,这是因为在互联网上做销售降低了成本,其中包括在向顾客提供信息时涉及的时间成本,以及更高的利润。