Answer:
1. $4,400 Favorable
2. $14,000 Unfavorable
3. $9,600 Unfavorable
Explanation:
The computation of given question is shown below:-
1. Variable factory overhead Controllable Variance
= $142,600 - 6,000 × 24.5
= $142,600 - $147,000
= -$4,400
= $4,400 Favorable
Where, 24.5 = standard rate - fixed overhead rate
= $28 - $3.5
= $24.5
2. Fixed factory overhead volume variance
= $35,000 - 6,000 × $3.5
= $35,000 - $21,000
= $14,000 Unfavorable
3. Total factory overhead cost variance
= ($142,600 + $35,000) - (6,000 × $28)
= $177,600 - $168,000
= $9,600 Unfavorable