Baseball magazine a domestic corp markets pictures of baseball players on its website. its data base server is in the Cayman islands. Baseball fans access the web page and use their credit cards to order they favorite pictures. The server electronically tranmitss the credit card number to Baseball magazine US Bank account. Baseball Magazine sends an instructions to an independent mailing house in the us to mail the photos to the fans from an inventory consigned by the players union. Baseball magazine never actually takes title to the inventory. What is the source of Baseball Magazine's Income?