The following data relate to factory overhead cost for the production of 15,000 computers: Actual: Variable factory overhead $240,000 Fixed factory overhead 160,000 Standard: 19,500 hrs. at $20 390,000 If productive capacity of 100% was 20,000 hours and the total factory overhead cost budgeted at the level of 19,500 standard hours was $394,000, determine the variable factory overhead controllable variance, fixed factory overhead volume variance, and total factory overhead cost variance. The fixed factory overhead rate was $8.00 per hour. Enter a favorable variance as a negative number using a minus sign and an unfavorable variance as a positive number.