Osage Company applies overhead based on direct labor hours. The variable overhead standard is two hours per unit at $12.00 per hour. During July, $113,792 was actually spent for variable overhead. 8,890 labor hours were used to produce 4,700 units. What is the variable overhead rate variance? O $6,120 unfavorable O $510 favorable O $3,200 favorable O $7,112 unfavorable