Clarification on WIP Product Cost Adjustment and Account Nature in GL

We are seeing Work in Process (WIP) Product Cost Adjustment entries because the ingredient costs used in work orders are being updated during the last week of each month. Due to this, the system is generating the WIP Product Cost Write-off event and posting to the following accounts:

• Work-in-Process Valuation
• Inventory Write-off

I would like to understand:

1. What is the nature of these accounts?
   • Should they be treated as expense accounts or asset accounts?
2. How should these accounts be handled in the General Ledger and Trial Balance?
   • What is the correct accounting treatment for these adjustments?

Please advise on the recommended handling for these accounts.