WZR Company employs a standard costing system for its single product. During July, WZR reported total direct labor hours of 6,500 and had a direct labor efficiency variance of $3,500 unfavorable. The standard direct labor rate per hour is $5 and the standard direct labor hours per unit is 2. The total direct labor variance for July was $400 favorable. The actual direct labor rate per hour during July was: $10.00 0 $7.80 $5.60 $5.10 $5.00 $4.90 $4.40 $3.20 none of the above choices are correct