Determine the variable factory overhead controllable variance, fixed factory overhead volume variance, and total factory overhead cost variance. Enter a favorable variance as a negative number using a minus sign and an unfavorable variance as a positive number. Line Item Description Amount Variance Variable factory overhead controllable variance $fill in the blank 13 Favorable Fixed factory overhead volume variance $fill in the blank 15 Unfavorable Total factory overhead cost variance $fill in the blank 17 Unfavorable