This is very simple! First you add product(s) on the platform. You can of course do this from multiple suppliers in one final shopping cart. Do that quickly via the "direct order" or simply from a product page.
If you look in the shopping cart, you will see the products with editing options and you will also receive some product suggestions from us. You can always go back to a storefront.
Of course the VAT and Shipping are shown. If there are multiple brands in your shopping cart, you will immediately see which are eligible for checkout. You can pay for everything at once with the green button "Checkout" or separately, with the black button (s) on the left.