I can support that. Along with listing a line item for every tax charged and what those taxes are used for. Perhaps a line item of credit card fees (for non App Store purchases.” Also a line item for salaries of your developers, a line item for the rent charged wherever you are working from. And perhaps a line item for exactly how much the servers and customer support costs.

What’s the markup of a product sold in a brick and mortar shop? It’s a whole lot more than 30%.