I’d like to score a problem set so students work until they have earned a set number of point (problems have different point values). I think the easiest thing would be to have a table that would check answers with a column for points earned so when a correct answer is entered those points are added to the student’s tally.

Is there a way to define a variable that is a sum of the values in a column that I could use to both display the point total and unhide an image congratulating them for earning the required number of points?