For example,
The Company currency is USD.
The Customer Currency is Canadian Dollars.
The Customer has a subsidiary. The Subsidiary currency is the British Pound.
So, I created an Invoice in EUR.
Thus, the Customer Balance = (Invoice amount * exchange rate (from EUR to British Pound) * exchange rate (from British Pound to Canadian Dollars).
I received the Customer Balance in Canadian Dollars.
But, the Company currency is USD.
And, after the integration process, I want to depict in my app the Customer Balance in relation to the Company currency.