Trevorrow Corporation manufactures and sells a single product. The company uses units as the measure of activity in its budgets and performance reports. During June, the company budgeted for 5,700 units, but its actual level of activity was 5,660 units. The company has provided the following data concerning the formulas used in its budgeting and its actual results for June: Data used in budgeting: Revenue Direct labor Direct materials Manufacturing overhead Selling and administrative expenses Total expenses Fixed element Variable element per month per unit $ 0 $ 28.10 $ 3.70 9.80 38,800 1.40 24,400 0.20 $ 63,200 $ 15.10 Actual results for June: Revenue Direct labor Direct materials Manufacturing overhead Selling and administrative expenses $ 163,008 $ 20,404 $ 53,208 $ 46,619 $ 25,567 The activity variance for net operating income in June would be closest to: Multiple Choice $520 F O O $520 U O $6,310 U $6,310 F