Here is a step-by-step guide to configure pricing profiles using the Metered Resource Pricing setup wizard.
Enable provisioning and management of resources in Microsoft Azure public cloud from private or hosted Windows Azure Pack
Usage and Billing Update 7 release enables key new scenarios and features such as configuring user level credits to support pre-paid plans, view usage by grouping subscriptions at the user level, support for custom formula for computing usage of metered resources, generating invoice PDF documents, and the *hot new* capability to implement custom usage collectors using C# extensions.