The following information relates to manufacturing overhead for the Chapman Company: Standards: Total fixed factory overhead $450,000 Estimated production 25,000 units (100% of normal capacity) Overhead rates are based on machine hours Standard hours allowed per unit produced 2 Fixed overhead rate $9.00 per machine hour Variable overhead rate $3.50 per hour Actual: Fixed factory overhead $450,000 Production 24,000 units Variable overhead $170,000 Compute (a) the fixed factory overhead volume variance, (b) the variable factory overhead controllable variance, and (c) the total factory overhead cost variance.