Answer:
1. Particulars Amount
Beginning Inventory 10,000
Add: Started during December 40,000
Less: Completed and transferred out 38,400
Balance that should have been (of WIP ending) 11,600
Less: WIP ending actual balance 8,000
Total Spoiled Units 3,600
2. Completed and transferred out = 38,400 units
Normal spoilage = 38,400 units * 5% Normal Loss
Normal spoilage = 1,920 units
3. Abnormal Loss Unit = Total Spoiled Units - Normal Loss units
Abnormal Loss Unit = 3,600 units - 1,920 units
Abnormal Loss Unit = 1,680 units