Use this information to answer the question that follow. The standard costs and actual costs for factory overhead for the manufacture of 2,500 units of actual production are as follows: Standard Costs 3 hours per unit @ $0.70 per hour Fixed overhead (based on 10,000 hours) 3 hours per unit @ $1.94 per hour Variable overhead Actual Costs Total variable cost, $18,200 Total fixed cost, $7,800 The variable factory overhead controllable variance is $2,920 favorable a. b. $3,650 unfavorable Oc. $0 Od. $3,650 favorable Use this information to answer the question that follow. The standard costs and actual costs for factory overhead for the manufacture of 2,500 units of actual production are as follows: Standard Costs Fixed overhead (based on 10,000 hours) 3 hours per unit $0.70 per hour 3 hours per unit @ $1.94 per hour Variable overhead Actual Costs Total variable cost, $18,200 Total fixed cost, $7,800 The variable factory overhead controllable variance is Oa. $2,920 favorable Ob. $3,650 unfavorable Oc. $0 Od. $3,650 favorable