Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Editor | Site | Style, clone of | Cost ( US$ ) | Open source | Activity |
| --- | --- | --- | --- | --- | --- |
| Ace (editor) | Home, demo | Sublime Text / Microsoft Visual Studio | Free | Yes | Yes |
| CodeMirror | Home, demo | plain textarea | Free | Yes | Yes |
| Orion | Home | Eclipse SWT StyledText, regular textarea | Free | Yes | Yes |
| Monaco Editor | example | Microsoft Visual Studio | used only by Microsoft | No | Yes |
| Markitup | Home, demo | Markup editor, no syntax highlight | Free | Yes | Some |
| LDT | Home | regular textarea | Free | Yes | Some |
| Ymacs | Home, demo | Emacs | Free | Yes | Some |
| CodePress | Home | Microsoft Visual Studio | Free | Yes | No |
| CodeTextArea | Home, demo | Microsoft Visual Studio | Free | Yes | No |
| EditArea | Home, demo | Microsoft Visual Studio | Free | Yes | No |
| Helene | Home [ dead link ] , demo [ dead link ] | Microsoft Visual Studio | Free | Yes | No |
| 9ne | Home | Emacs | Free | Yes | No |
| jsvi | Home | vi | Free | Yes | No |
| MDK-Editor | Home | Microsoft Visual Studio | Depends on use | Code is readable | No |
Question:
What is the cost of an Open Source that is no?
Answer:
used only by Microsoft