In our Nursing department, the grade book has three groups, assignments, exams and the final exam. They are weighted at 10%, 60% and 30% respectively. Students must achieve a 77% average for the two exam groups before the assignments group is added in. Students who do not achieve 77%, do not receive credit for the assignments. There are a few students in some classes who do not meet this threshold. How do we set the assignment group to only include the points for those students who have 77% or more in the exams. The assignment grades are not added until after the final exam is complete and graded.