Definitely not, but the way they probably calculate this is: Total Bill of Materials = display + motherboard + laptop case + keyboard + trackpad + charger

Definitely not, but the way they probably calculate this is: Total Bill of Materials = display + motherboard + laptop case + keyboard + trackpad + charger + cable Then they figure out what percentage each subassembly costs in the BOM and then divide by the retail price of the product, maybe rounding up a hundred or two. So if for example the motherboard is 40% of the total BOM of a $2500 laptop, you have a $1,000 motherboard right there.