Grade Center Columns: https://help.blackboard.com/Learn/Instructor/Ultra/Grade/Grading_Tasks/Calculate_Grades
We have had several instances where instructors call because their Final Grade column calculation is wrong. They have created the column as an Average calculated column. Here is why the calculations appear to be wrong to the instructor:
An "Average" calculated column actually calculates the "mean percentage correct"; that is, it takes the total number of percentage points awarded per column, adds them up, then divides by the number of columns.
When most instructors say "average", what they really want is the total number of points divided by the total number of possible points. To get that in Blackboard, you use a "Total" column, displayed as a percentage.