Have no interest in buying EZZ stock. Just see curious things...

Have no interest in buying EZZ stock. Just see curious things that you don't normally see in a company that manufactures things.

At the end of the day, you're selling a physical product - is it normal to triple your sales of your physical product, while barely increasing the cost of raw materials used, in the same year? Economies of scale might mean cost of sales go up slower than sales, but by this little? Maybe if you're selling an intangible product, like a subscription fee or services, then it's normal for sales to skyrocket without corresponding increases in cost of goods sold. But for physical product, it doesn't seem normal to me.