There some scenarios when Cost Price is zero for returned product in POS.
1. When you do a "Blind return". This means you 'Return product' in POS without any settlement to the original sales transaction. Then Cost price might be zero.
2. When sales and return transaction is in the same statement (even 'Return transaction' is used). Then Cost price might be zero. Using trickle feed feature, it should be only about 2% when the scenario of having the sales and return in the same statement can happen. (For this one we have a feature request # 15482192 to analyze and improve in future versions).
In both above options we cannot find the original cost price.
How to avoid zero cost price in Inventory transactions:
- When creating new product – you need to enter Default Purchase Price.
- If you do not do that in step 1, you can enable ‘Latest cost price’ on a Product:
When the parameter 'Latest cost price' is enabled, Cost price will be filled in with Latest cost price once Purchase Invoice is posted.
Then this cost price will be automatically filled in Sales order return line in field ‘Return cost price’ and Inventory return transaction will be filled in with Cost price.
If above options are not accepted for your business scenario – you would need to create a customization.