Answer:
the labor efficiency variance for August is $1,680 unfavorable
Explanation:
The computation of the labor efficiency variance is shown below:
Labor efficiency variance is
= (Standard hours - Actual hours) × Standard rate
where,
Standard hours is
= 19,000 units × 2
= 38,000 hours
Now
Labor efficiency variance is
= (38,000 - 38,140) × $12
= $1,680 unfavorable
Hence, the labor efficiency variance for August is $1,680 unfavorable
This is the answer and the same is not provided in the given options