In a cost sheet, Work-in-Progress (WIP) is adjusted to find the correct Factory Cost.
Opening WIP is added because it represents work done last period but completed this period.
Closing WIP is subtracted because it is work started but not finished during this period.
Treatment in the Cost Sheet:
Prime Cost: ₹ 20,00,000
Add: Factory Overheads: ₹ 8,00,000
Gross Works Cost: ₹ 28,00,000
Add: Opening WIP: ₹ 2,00,000
Sub-Total: ₹ 30,00,000
Less: Closing WIP: ₹ 1,40,000
Factory Cost: ₹ 28,60,000
Therefore, the correct Factory Cost after adjusting WIP is ₹ 28,60,000.
This ensures that only the cost of work completed during the period is shown in the cost sheet.