Add explanation why IAP prices are the way they are?

Hello, is it allowed to add an explanation to the In App purchases in the app describing why the prices are the way they are? Especially I would like to explain why the prices differ from the prices in the Android Version -> The pricing tiers of Apple and Google do not match, it is not possible to have the same price even only for the two countries USA and Germany across the two platforms.

Another question, maybe the reason for the problem above, is why the prices in USD (in USA) and EUR (in germany) do not match the exchange rate? In the first pricing tier an item costs $0,99 and 1,09€. But when using the current exchange rate it should be 0,81€ (and even if not using the exchange rate right now, it was not above 1€ for a long time). And that is the case for every tier. The € prices are always above the $ prices. So when I want to make the USD prices for the Android and iOS version the same the EUR prices whould be much much higher. And if I want to make the EUR prices the same the USD prices would be much lower.
Add explanation why IAP prices are the way they are?
 
 
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