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 @ $0.75 per hour Variable overhead 3 hours per unit @ $1.90 per hour Actual Costs Total variable cost, $17,800 Total fixed cost, $8,000 The total factory overhead cost variance is O a. 55425 unfavorable Ob. 57,300 favorable Oc. $5,425 favorable Od: $3,550 unfavorable