What is one of the locations where order billing information is available?

The option that refers to one of the locations where order billing information is available is the Reminders section. In NetSuite, the Reminders portlet provides users with a customizable view of tasks that need attention, such as invoices to be sent, payments due, or billing information that requires follow-up. This functionality helps users keep track of their billing and accounts receivable processes more efficiently.

The other locations mentioned, while relevant to other aspects of order management, do not specifically highlight order billing information. For instance, the Shipping Summary Page focuses more on the details related to the shipment of orders rather than billing, Inventory Management deals with stock levels and product availability, and Supplier Information pertains to vendor records and data rather than customer billing. Thus, the Reminders section is best suited for tracking and managing order billing information within the NetSuite environment.