如果Azure部署插槽已关闭，您仍然需要为其运行的计算机付费吗？

I have a few Azure websites running on Reserved instances that have Auto-scale turned on so they will take 1->6 servers but are usually just running on one server. I am trying to set up hot-swapping so that when I deploy there is no down time. I have created a deployment slot but am I charged extra for the deployment slot? Even if it is turned off? I have a few Azure websites running on Reserved