Answer:
See below
Step-by-step explanation:
1. Purchase price variance
Standard price per pound = $25
Actual price per pound = $28.9
Quantity of aluminium purchased = Closing inventory + Quantity used - Opening inventory
= 34 + 3,470 - 54
= 3,450 pounds
Purchase price variance = (Standard price - Actual price) × Quantity purchased
= ($25 - $28.9) × 3,450
= -$3.9 × 3,450
= $13,455 (U)
2. Usage variance
Standard quantity of Aluminium for actual production
= 935 units × 4 pounds each
= 3,740 pounds
Usage variance = (Standard quantity of material used - Actual quantity used) × Standard price per unit
= (3,740 - 3,470) × $25
= 270 × $25
= $6,750 (F)
3. Direct labor rate variance
= (Standard rate per hour - Actual rate per hour)
× Actual hours for production
= ($40 - $41.9) × 4,400
= -$1.9 × 4,400
= $8,360 (U)
4. Efficiency variance
Standard hours for actual production
= 935 units × 5 per hour
=4,675 hours
Labor efficiency variance = (Standard hours for actual production - Actual hours for actual production) × Standard rate per hour
= (4,675 - 4,400) × $40
= 275 × $40
= $11,000 (F)