Assume that a company has two cost driversnumber of courses and number of students. The planned number of courses and students were 5 and 100, respectively. The actual number of courses and students were 6 and 110, respectively. One of the companys expenses is influenced by both cost drivers and it has a fixed element as well. Its cost formulas are $59 per course, $7 per student, and $1,000 per period. The activity variance for this expense would be