Cumulative Grading of Assessments in CoursePress-Pro

I need to setup a serious of multiple choice test questions and assign a pass/fail grading when the user ansers 70%+ of the questions correctly.

I only see the ability to set a passing percentage on a per question basis. Am I missing something or is there no ability to set a cumulative pass/fail capability?

This seems like it should be possible since it is a core functionality for any testing/assement feature. Thanks!