Starbucks Corporation trains and hires barristas nationally for their outlets. Starbucks has a direct labor standard of 4 hours per unit of output. Each employee has a standard wage rate of $13.00 per hour. During February, Starbucks. paid $99,600 to employees for 9,240 hours worked. 2,480 units were produced during February. What is Starbucks' direct labor rate variance? Multiple Choice O $20,520 favorable O $8,840 favorable O $29,360 favorable O $19,672 favorable