To generate a report of all your vendor sales, per currency, click on Reports in your lefthand toolbar.
Next, scroll down and select the box labeled Vendor Sales.
From this screen you can use the Columns and Filters tools on the right side to specify your view by selecting and deselecting the various sorting options.
To specifically see reported vendor sales per currency, drag the "Currency" option in the right hand toolbar to the section labeled Row Groups. By clicking on a specific currency, you will see the reported vendor sales for that currency only.
For more information on how to use reports and how to manipulate, customize and export your reports, please reference our screencast tutorial "Reporting Overview"