Lenci Corporation manufactures and sells a single product. The company uses units as the measure of activity in its budgets and performance reports. During May, the company budgeted for 5,100 units, but its actual level of activity was 5,050 units. The company has provided the following data concerning the formulas used in its budgeting and its actual results for May: Data used in budgeting: Revenue Direct labor Direct materials Manufacturing overhead Fixed element per month Variable element per unit $ 0 $ 0 0 41,500 $ 39.60 $ 5.50 15.70 1.30 0.20 $ 64,200 $ 22.70 Selling and administrative expenses 22,700 Total expenses Actual results for May: Revenue Direct labor $ 197,810 $ 28,565 Direct materials Manufacturing overhead $ 80,265 $ 47,905 Selling and administrative expenses $ 22,680 The revenue variance for May would be closest to: $4,150 F $2,170 U $2,170 F $4,150 U