Answer:
1. Variable Overhead Efficiency
= Standard rate * (Actual hours - Standard hours)
= 3 * ( 8,800 * 0.3 - 2,560)
= 3 * 80
= $240 Favorable
2. Materials Quantity Variance:
= Standard price * (Standard quantity - Actual quantity)
= 3 * (8,800 * 9.2 - 78,150)
= 3 * 2,810
= $8,430 favorable
3. Materials price variance:
= Standard cost of purchased materials -Actual cost of purchased materials
= (3 * 85,900) - 240,520
= $17,180 Favorable
4. Labor efficiency variance
= Standard labor rate * ( Actual hours worked - Standard labor hours)
= 17 * ( 2,560 - 8,800 * 0.3)
= 17 * 80
= $1,360 Favorable
5. Labor rate variance:
= (Standard rate * actual hours worked) - Actual labor cost
= 17 * 2,560 - 39,424
= $4,096 favorable
6. Variable Overhead rate variance:
= (Overhead rate * Actual hours) - Overhead cost
= (3 * 2,560) - 6,912
= $768 Favorable
