Real-money prices are shown exactly as the platform store returned them. We never build a price string ourselves, never convert a currency and never append a symbol, so what you read is what the store charges.
The price is fixed to this offer version. If the server has since changed it, we close this sheet and ask you again with the new price rather than charging the old one.
If your confirmed balance is not enough, confirm stays disabled and says why. It never quietly turns into a real-money purchase.