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This section describes a small-scale business application that produces reports with dollar amounts. While this application doesn't introduce any new material, it does emphasize the data processing and reporting capabilities of awk. (Surprisingly, some people do use awk to write small business applications.)
It is presumed that a script exists for data entry. The data-entry script has two jobs: the first is to enter the customer's name and mailing address for later use in building a mailing list; the second is to record the customer's order of any of seven items, the number of items ordered, and the price per item. The data collected for the mailing list and the customer order were written to separate files.