The following data relate to factory overhead cost for the production of 8,000 computers: If productive capacity of 100% was 13,000 hours and the total factory overhead cost budgeted at the level of 8,000 standard hours was $258,750, determine the variable factory overhead Controllable Variance, fixed factory overhead volume variance, and total factory overhead cost variance. The fixed factory overhead rate was $3.75 per hour. Enter a favorable variance as a negative number using a minus sign and an unfavorable variance as a positive number