Neil's Service Shop performs routine vehicle maintenance. One such service is tire rotations. Neil's reports the following budgeted and actual amounts for tire rotations for the month of August. Standard direct labor hours per vehicle 0.25 Standard direct labor rate per hour $13.00 Actual hours worked 550 Actual total labor cost $8,900 Actual number of vehicles serviced 480 What is the labor efficiency variance for the month of August? A. $6,958 unfavorable B. $5,590 favorable C. $5,590 unfavorable D. $6,958 favorable