Fixed price Project


I need to work on a fixed price project from Monday onwards.

Following are my queries:

  1. Is there any way to put total project price in the sales agreement for the project?
  2. My boss wants to see the duration of the project in months. I know there is start and end date but he is wants duration in months. How do I get it.
  3. When I add sales agreement to a project, how and where do data from sales agreement populate in any particular project.