chargeAmount.Amount is invalid when changing currency after selecting other shipping address

[ChristianAF]

Describe the bug
Using: Price Based on country plugin for multi-currency, only happens with the free version because of the decimals in JPY currency that should not have any. With Pro version the decimals can be changed to 0 and the issue is fixed.

Steps to Reproduce:
1- Setup Amazon with Price based on country
2- Add product to cart and use the Express Checkout.
3- Select other shipping address that changes the amount (like JPY)
4- Try to place order

Screenshots

Expected behavior
Trnsactions is JPY should remove the decimals

Isolating the problem (mark completed items with an [x]):

• I have deactivated other plugins and confirmed this bug occurs when only the extension is active.
• I can reproduce this bug consistently using the steps above.