Then the apps should be able to add a line item called "convenience fee" that si equal to the amount apple is charging them. The reality is though apple wants

Then the apps should be able to add a line item called "convenience fee" that si equal to the amount apple is charging them. The reality is though apple wants to hide their extortion of their customers, if every in-app purchase had a 30% apple tax applied to it the customers would be very upset with apple