Please answer the question.

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 at $ per hour Variable overhead 3 hours per unit at $ per hour Actual Costs Total variable cost, $ Total fixed cost, $ The total factory overhead cost variance is Oa. $2,000 favorable Ob. $2,500 unfavorable Oc. $5,000 unfavorable d. $5,000 favorable 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 at $ per hour Variable overhead 3 hours per unit at $ per hour Actual Costs Total variable cost, $ Total fixed cost, $ The total factory overhead cost variance is Oa. $2,000 favorable Ob. $2,500 unfavorable Oc. $5,000 unfavorable d. $5,000 favorable