On the sales order lines, it is possible to unfold your parts lists.
In a BOM it is possible to use the menu item "BOM"
When selecting 'Unfold BOM' you get the option to choose if you want to use "Price from BOM"
If you do not check the 'Use prices from BOM' box, you will get the price from the main BOM item, as shown below.
If you choose to use prices from the parts list, check 'Use prices from parts list'
Then the BOM unfolds and shows the prices per BOM item, as shown below.





