Cheerful Colors has budgeted three hours of direct labor per batch of crayons, at a standard cost of $16/hour. During October, laborers actually worked 150 hours completing 50 batches. All 50 batches actually produced were sold. Cheerful Colors paid workers $20/hour. What was Cheerful Color's direct labor cost variance for October?

A) $200 U

B) $600 F

C) $600 U

D) $200 F