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 favorable. 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 unfavorable. The total number of units produced during July was: 14.400 11,600 10,800 7,900 6,500 3,600 2,900 none of the above choices are correct