What is the pricing policy for hosting apps on play.google.com?

Question

Android

Good day!
In the light of recent events, in connection with the growth of the $, I wondered about the pricing policy when placing applications.
Initially, I placed the application for $10, then arranged a promotion and lowered it to $5. buy 2 times more actively.
Decided to leave the price at $5. But now the dollar exchange rate is unstable.
Here I think:
- Leave the price at $ 5 and convert at the current dollar rate with serious fluctuations.
- Leave the price at $5 and don't convert anything, leaving the local prices unchanged.
- Leave the price at $5, and manually fill in the local prices.
Now I've started using the last tactic. $5, 150 rubles, 5 euros, 5 pounds.
Now I'm thinking, isn't it too expensive - 5 euros and 5 pounds?
I think 150 rubles is a psychological price for many, many will not pay more, but for others 150 rubles will be almost like 120, and he will be ready to pay.
Who's like with the pricing policy? How to choose the best price?
In general, I'm a little confused. I welcome any advice, thoughts, tips, ideas!