Sure - if you assume these goods have a fixed quantity. For example, I'm willing to bet McDonald's is capable of making many, many, many more big macs than they currently do.

They've simply pegged their supply chain to the amount of demand they currently see while minimizing costs and trying to optimize profit.

Almost all industries get significant savings the larger they scale. There's very real reason to think many industries would get cheaper if they were suddenly trying to produce a multiple of the same product.