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Oddo Corporation makes a product with the following standard costs: Standard Quantity or Standard Price or Standard Cost Hours Rate Per Unit Direct materials 3.0 ounces $8.60 per ounce $25.80 Direct labor 0.7 hours $23.00 per hour $16.10 Variable overhead 0.7 hours $4.00 per hour $2.80 The company reported the following results concerning this product in December. Originally budgeted output 4,560 units Actual output 4,360 units "Raw materials used in production 3,330 ounces Actual direct labor-hours 3,302 hours Purchases of raw materials 15,170 ounces Actual price of raw materials $8.40 per ounce Actual direct labor rate $19.90 | per hour Actual variable overhead rate $4.10 | per hour The company applies variable overhead on the basis of direct labor-hours. The direct materials purchases variance is computed when the materials are purchased. The materials quantity variance for December Is: $2,150 F $2,100 F $2,100 U $2,150 U