How to List Multiple Currencies in Bulk Item Exchange?

How can I set up 2 or 3 currencies so they’re displayed in the bulk item exchange on the trade website - see the image below?

right click and list 3 waystones at different currency amounts or currencies, it should show up like that on the trade site as long as those people clicked that currency. to see all of them like you have shown the buyer would only have to check all 3 currency options then they would see all of your listings like the image.