At the product page, you can submit the quantity of the product you want to order. Some products require an option to be selected. By clicking on the 'Add to cart' button, the products will be saved. You will be redirected to your shopping cart. On this page you can view the products you collected in your card and you'll find a tool to calculate the shipping costs. Also, you can view the prices excluding VAT.
Do you want to shop some more? Just click 'Continue shopping' and you will return to the shop. The products you just placed in your cart will be saved. When you are finished with collecting the products you want, you choose the 'My cart' button at the top-right of the screen (the buttons displays in a pop-up). You return to the shopping cart page and you are ready to start the order placement process.