Arbers Corporation manuractures and sens a single product. The company uses units as the measure or activity in its budgets and performance reports. During April, the company budgeted for 7,600 units, but its actual level of activity was 7,570 units. The company has provided the following data concerning the formulas used in its budgeting and its actual results for April: Data used in budgeting: Fixed Variable clement clement per month per unit Revenue.. $35.20 $ 0 Direct labor Direct matcrials Manufacturing overhead Selling and administrative expenses Total expenses....... Actual results for April: 48,500 20,900 $69,400 $ 5.40 15.10 1.80 0.50 $22.80 ***** Revenue... $277,604 Direct labor $42,018 Direct materials $109,227 Manufacturing overhead $62,176 Selling and administrative expenses $25,345 The activity variance for selling and administrative expenses in April would be closest to: $15 F $645 F $15 U $645 U