Just need the answer.

Solly Corporation produces a product for national distribution. Standards for the product are: Materials: 12 ounces per unit at 60t per ounce. . Labor: 2 hours per unit at $8 per hour. During the month of December, the company produced1 Materials: 14,000 ounces purchased and used at a total cost of $7.700. Labor: 2,500 hours worked at a total cost of $20,625 The labor efficiency variance is: Multiple Choice $4,000 F $4125 F $4125 U $4000 U