If I have a category of optional assignments set up on Canvas, let's say it's its a category worth 5% for extra reading, as an example. This is extra credit. Some of the students do the extra reading so they get a hundred in that category, worth 5%, and some students don't do it. The students who don't do it, don't get a 0, it's just left blank, so they will only have 95% worth of grade at the end of the year. Does that affect them negatively or will Canvas re-evaluate the math for those students?