The paragraph is followed by an incomplete phrase or sentence which summarizes the main idea of the paragraph. Choose the missing words of the phrase or sentence.

The billions of dollars a year that American companies are saving thanks to the Internet's ability to slash their cost of doing business is making them even more successful competitors on world markets. This is reflected in better prices for their customers and increased profits for themselves, with much of it coming from greatly improved ways of cutting costs.
（） business online.