Note: Kit items can only have one of the following valuation methods: Average cost, FIFO, or LIFO

Use the Inventory Valuation Change Utilities to change an inventory item's valuation method.

• To change the valuation method to Standard, Average, LIFO, or FIFO:

1. Open Inventory Management, Utilities, Item Valuation Change Selection.
2. Select a Product Line or an Item, and the new valuation (standard, average, LIFO, FIFO).
3. Print and update the Inventory Valuation Change Register.

• To change valuation method to Lot or Serial:
  1. Use Inventory Transaction Entry to adjust the quantity down to zero in every warehouse.
  2. Open Inventory Management, Utilities, Item Valuation Change Selection. 
  3. In Valuation Selection, select Product Line or Item, and the new valuation (Lot, Serial).
  4. Print and update the Inventory Valuation Change Register
  5. Use Inventory Transaction Entry to adjust the item back into stock.

     NOTE:  To change individuals items, you may go directly to Item Valuation Change Maintenance.

DocLink: What are the Valuation Change Methods in Sage 100? What is the cost used when changing the valuation method of inventory item codes?
DocLink: No action - noncompatible standard cost message when trying to merge items or Incompatible costing method