We currently show fees only after choosing the amount of gold, and payment method. I checked our desktop, tablet, and mobile, and I see fees listed on each.
When resizing the window during checkout, the summary component does disappear, however, so does the pay now button. And so if you don't see the fees, you aren't able to pay. We didn't take this into account because users don't typically use a different device or resolution during the checkout flow.