Bonnie Company applies overhead based on machine hours. The variable overhead standard is 16 hours at $10.50 per hour. During March, Bonnie spent $144,150 for variable overhead, and 13,110 machine hours were used to produce 790 units. What is the variable overhead rate variance? Note: Do not round intermediate calculation. Multiple Choice $12,200 unfavorable $6,495 favorable $6,495 unfavorable $11,100 unfavorable