Displaying Default Variable Value in the LMS

I have two queries:

1) To track the progress of my module, I've added a default variable, "Project.Progress," to the master slide. How can I ensure that the value of this variable is sent to the LMS if the user closes the course abruptly? 

I have set the status to be reported to the LMS as: Completed/Incomplete.

2) Is it possible to modify the manifest file to retrieve the value of this variable in the LMS?