Unfortunately, no it is not possible to set the cost of goods as a percentage of the selling price.
There is a workaround though, you can add “Extra Costs” per order as a percentage. But this percentage will be the same for all products.
As for the multicurrency option, it’s not possible to set currency per product. But possible to set exchange rates for currencies. Our plugin is also compatible with Multi Currency for WooCommerce” plugin
You cannot rename the cost of goods to supplier commission.
I suggest you test the free version of the plugin. It will give you a good idea on how the plugin works.