Create an invoice for the customer in the company currency.

Create an invoice in a foreign currency for the same customer.

Open the Aged Receivable report from Accounting → Reporting.

We can see the Aged Receivable report for the customer for whom we created invoices, with separate total lines for both currencies.

The PDF report also displays the same information.

Create vendor bill for the vendor in company currency.

Create vendor bill in a foreign currency for the same vendor.

Open the Aged Payable report from Accounting → Reporting.

We can see the Aged Payable report for the vendor for whom we created bills, with separate total lines for both currencies.

The PDF report also displays the same information.

If more than one foreign currency is used during a period, both total lines will display amounts in the company currency only. The "Total in Company Currency" will show the sum of invoices or bills in the company currency, while the "Total <partner>" will show the sum of foreign currency invoices or bills converted into the company currency.