Say I have a web interface that I have designed in Adobe Illustrator or Macromedia Fireworks. And that's exactly how I want it to look on the web. There is a very simple navigation set up, and the layout is simple as well. It's just a box with rounded corners (which will contain the content). I would want that box to always be centered in the browser window. Given the Illustrator or Fireworks mock up file, how much should I expect to pay someone to code it into an HTML/CSS template for use with ZenCart which I can then use to build my own ecommerce site?