Is it possible that the difference in cost of producing ten Chicken McNuggets and twenty Chicken McNuggets is negligible? Chicken McNuggets are likely produced

Is it possible that the difference in cost of producing ten Chicken McNuggets and twenty Chicken McNuggets is negligible? Chicken McNuggets are likely produced by machines, since they all come in the same n shapes (n a small integer). Whether I order ten or I order twenty, I feel like the McDonald's employee opens a bag of them into a fryer without counting them out. Maybe they always cook the same number in a match to keep the result uniform. Maybe the difference in cost for the two box sizes is trivial. And maybe the other half of the batch has a non-trivial probability of being thrown out because another order of 10 McNuggets won't come within "safe" food serving time, so they may as well give it to me for the extra $0 to make it feel like I got a deal. Or maybe it's just something Marketing thought up, even though it reduces their profits. I'm under the impression that in other countries (Canada?) the retail price of 20 McNuggets is greater than 10.