Assembly line workers at Sandhill Manufacturing worked a total of 10900 direct labor hours to produce 44400 units. The standard for producing one unit is 15 minutes at a wage rate of $12.1. If the actual wage rate was $12.60 per direct labor hour, Sandhill's direct labor efficiency variance is O $2420 unfavorable. O $2520 unfavorable. O $2520 favorable. O $2420 favorable. Save for Later Attempts: 0 of 1 used Submit