The following data relate to factory overhead cost for the production of 8,000 computers:

                                  

If productive capacity of 100% was 10,000 hours and the factory overhead cost budgeted $284,000 the level of 8,000 standard hours was $284,000, determine the variable factory overhead controllable variance, fixed factory overhead volume variance, and total factory overhead cost variance. The fixed factory overhead rate was $18 per hour.