Final answer:
Vaughn's total labor variance is $3,520.
Step-by-step explanation:
To calculate Vaughn's total labor variance, we need to determine the standard labor cost given the standard of 2 hours of labor per unit at $12 per hour. Then we can compare it to the actual labor cost.
- Calculate the standard labor cost: 2 hours per unit * $12 per hour = $24 per unit.
- Calculate the total standard labor cost for producing 3400 units: $24 per unit * 3400 units = $81,600.
- Calculate the labor variance: Total standard labor cost - Actual labor cost = $81,600 - $78,080 = $3,520.
Therefore, Vaughn's total labor variance is $3,520.