You don't need both Billing and Invoicing. Invoicing is for one-time payments (typically after a service has been delivered), and Billing is for recurring payme

You don't need both Billing and Invoicing. Invoicing is for one-time payments (typically after a service has been delivered), and Billing is for recurring payments. All in all, we're looking at $0.30 + 3.4% (or 3.3%). This is clearly lower than 30%, except for very inexpensive apps (~$1.29 or less).