The standard factory overhead rate is $7.50 per machine hour ($6.20 for variable factory overhead and $1.30 for fixed factory overhead) based on 100% of normal capacity of 80,000 machine hours. The standard cost and the actual cost of factory overhead for the production of 15,000 units during August were as follows: Actual: Variable factory overhead $360,000 Fixed factory overhead 104,000 Standard hours allowed for units produced: 60,000 hours The variable factory overhead controllable variance is a.$12,000 favorable b.$12,000 unfavorable c.$26,000 unfavorable d.$14,000 unfavorable