Set a Total Points Limit in an Assignment Group?

Community Participant

I am using a straight points system in my Gradebook. I have several assignment groups. for one of which I would like to limit the total number of points that can be earned. 

For example...

In this assignment group there might be 10 low point assignments available. These assignments are not required, but students can choose to complete any of these extra assignments across the semester to boost their grade. Some are online quizzes, some are paper submissions. The point value for these individual assignments will vary, but full points for all of these assignments would total 120 points. I would like to somehow 'tell' the Gradebook to count only up to 90 of these points in this assignment group, and to ignore the rest. Is this possible in Canvas?