The direct labor standards for a particular product are 4 hours of direct labor at $12.00 per direct labor-hour = $48.00. During October, 3,350 units of this product were made, which was 150 units less than budgeted. The labor cost incurred was $159,786 and 13,450 direct labor-hours were worked. The direct labor variances for the month were: Labor Rate Variance Labor Efficiency Variance A) $ 1,614 U $ 600 U B) $ 1,614 U $ 600 F C) $ 1,614 F $ 600 U D) $ 1,614 F $ 600 F