Sterling Company's standard labor cost per unit of output is $20.00 ( 2 hours $10.00 per hour). During August, the company incurs 2,090 hours of direct labor at an hourly cost of $11.00 per hour in making 1,000 units of finished product. Compute the total labor variance. $2,990 favorable $2,990 unfavorable $900 unfavorable $3,990 unfavorable