Being the Kenmore nut job that I am I spend a lot of time prowling Sears Parts Direct looking for treasure, parts for old vacuums that are still in stock for some reason or the other, maybe because it was an oddball that never sold or the part is now molded in gray plastic instead of ivory and still in production for modern vacs (you would be surprised the age and heritage of some parts that are still in production three or four decades). Sometimes the same part has different part numbers on different model vacs so while the parts listing for your model vac might say the part is NLA, the same part with a different number, same form fit and function, will still be available for another model vac.
Anyhoo, something I have noticed is that the parts count on vacuums has been reduced from the 140s for my 1971 Vintage Kenmore 2.7 canister vac, the infamous Avocado Bomber, to the 80s for my first gen 5055 bagged machines such as the one featured over in the Vintage section yesterday and Whispertone (Whimpertone!)series vacs, all the way down to about 35-ish for a modern Progressive canister. Some of that is because Sears now shows the parts for the cord reel in a separate diagram, but that is only ten or twelve more parts (but you can now disassemble their cord reels and replace worn out parts, this folks is real progress). You get the idea. Fewer parts means fewer assembly steps and a much more streamlined logistics train to support the assembly line.
But Vintagerepairer has a valid point. I'm a cost estimator by trade and in general we calculate overhead, "G&A" for general and administrative expense, taxes etc. at around 150% of wages, meaning it is another sum added to wages equal to about 150% of wage cost (include benefit costs in wage calcs, many do not). Then you do a similar calculation for materials. They also have their own overhead, G&A, taxes, etc. Finally you sum those costs and calculate profit and fees (many contracts are performance based, meaning if the contractor comes in under budget or ahead of schedule they can collect extra money called fees, and if they are behind the are sometimes penalized for it contracturally).
That just gets the product out the plant door. Now the shippers, warehouse/logistics company (often the same in this age of "integrated logistics services") all have to pay their own overhead costs, G&A, taxes and the like and make a profit doing so. Same thing with a different cost structure for internet sales.
If that part of the retail chain didn't exist, customers would have to go to the factory door to buy your product. Guess how many you would sell that way? Not many, even if your plant was located in the middle of the US or the middle of Ol' Blighty. Customers also factor in their transportation and time costs into a transaction.
So saying so and so can manufacture a product for x number of pounds is usually highly misleading.