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) Variable overhead hours per unit @ $0.78 per hour 3 hours per unit @ $1.95 per hour Actual Costs Total variable cost, $18,100 Total fixed cost, $7,800 The total factory overhead cost variance is a. $3,475 unfavorable ob. $5,425 favorable C. $5,425 unfavorable d. $7,375 favorable