Assume that the standard cost to make one finished unit includes 2 hours of direct labor at $4 per hour. During March, 12,000 direct labor-hours were worked, 5,250 units of product were manufactured, and total direct labor cost was $60,000. What is the labor efficiency variance for March?

Group of answer choices

$6,000 (U)

$7,500 (F)

$6,000 (F)

$7,500 (U)