The Following Information Relates to Manufacturing Overhead for the Chapman

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.