It costs the same, we just mark it as an opportunity cost of unloading the memory on the spot market.

If I buy contracts for 1 gold bar at $500, and the gold price runs to $1200, I can either continue to market my gold-containing product for the same profit margin, or I can unload all that gold for $1200/bar and make a profit of $700/bar. If my profit margin is high and it doesn't take many gold bars to make a thousand units, maybe discontinuation doesn't make any sense. But if my product is "solid gold statuary of Dear Leader", and the bars are most of my cost basis, I know what I'd do.