Costed Bill Inquiry

Hi all

We have an issue with the Costed Bill Inquiry, where it shows a Purchase cost for the manufactured item, which is essentially doubling the cost of the item when vieiing the Costed Bill Inquiry screen.  This is a screenshot of one of the affected manufactured items:

I checked some setup likle the master BOM but cannot find any issue, what else can I check that may be setup incorrectly?

Thanks

Nic