Hurren Corporation makes a product with the following standard costs: Inputs Standard Quantity or Hours Standard Price or Rate Standard Cost Per Unit Direct materials 3.4 grams $4.00 per gram $13.60 Direct labor 0.6 hours $11.00 per hour $6.60 Variable overhead 0.6 hours $8.00 per hour $4.80 The company reported the following results concerning this product in June. Originally budgeted output 8,500 units Actual output 8,400 units Raw materials used in production 28,280 grams Actual direct labor-hours 4,800 hours Purchases of raw materials 30,800 grams Actual price of raw materials purchased $4.10 per gram Actual direct labor rate $11.90 per hour Actual variable overhead rate $7.70 per hour The company applies variable overhead on the basis of direct labor-hours. The direct materials price variance is computed when the materials are purchased. The labor efficiency variance for June is: $2,640 F $2,856 U $2,856 F $2,640 U