Answer and Explanation:
a, The computation is shown below:
Computation of labor variances:
Total Labor variance = Standard Labor cost - Actual Labor cost
= {(2000 × 1.90 × $17.40) - (4000 × $17.70)
= $66,120 - $70,800
= $4,680 Unfavorable
Labor price variance = (Standard price - actual price) × actual labor hours
= ($17.40 - $17.70) × 4,000
= $1,200 Unfavorable
And,
Labor quantity variance = (Standard hours - actual hours) × standard rate per hour
= {(2,000 × 1.90) - 4,000) × $17.40
= $3,480 Unfavorable