Setup In Developer Console
Make sure that you downloaded additional Amazon Billing package in your project.
In-App Purchasing handles the details of purchase flow, payment processing, receipts, and rights management for the purchasable content. Now with unique receipt identifiers, you can easily ensure that customers receive purchased in-app items quickly, as well as track transactions and fulfillment.
Go directly to a tab In-App Items:
and create products of any type you need by pressing respectively: