Raven applies overhead based on direct labor hours. The variable overhead standard is 11.5 hours at $20.5 per hour. During July, Raven spent $1,091,700 for variable overhead. 52,380 labor hours were used to produce 4,600 units. What is the variable overhead efficiency variance? Multiple Choice $10,660 favorable $17,910 favorable $979,490 favorable $17,910 unfavorable