When an Item's Purchase Price (Item Record > Inventory tab) is null/blank, Drop Ship Purchase Orders copy the rate from the originating Sales Order.
- Go to Lists > Accounting > Items
- Item record: Click Edit
- Click Inventory tab
- Set the Purchase Price
- Click Save
This only applies to Items that are not marked as Drop Ship Item. This is only reproducible when the Drop Ship or Special Order link is clicked on the Sales Order's line item to manually generate a Purchase Order.