Answer:
The correct option is $7,000 favorable.
Step-by-step explanation:
This can be calculated using the following formula:
Standard hours for actual units produced = Actual units produced * Estimated number of hours to manufacture a completed unit = 9,000 * 2 = 18,000
Variable-overhead efficiency variance = (Actual machine hours worked - Standard machine hours for actual units produced) * Standard variable overhead cost per machine hour = (16,000 - 18,000) * 3.50 = –$7,000
Since the calculated Variable-overhead efficiency variance is negative, that implies that it is favorable,
Therefore, the correct option is $7,000 favorable.