Hi Marty, thanks for your response.
This is a brand new course that was set up to test the gradebook. I have only these 3 assignments and grades in the whole course. The "hide totals if they contain hidden items" setting is set to "show totals excluding hidden items."
I have attempted to set up the gradebook many times before and have never been able to get this to work. I really need to have a constant running total of the final grade for the students. I've been changing settings to test various things. The categories were originally set to "sum of grades" but didn't work, so I tested out "simple weighted." It didn't make a difference, so I changed them back to the "sum of grades."