Yeah, I didn’t even had a printer until I started working from home. It’s so good to use those free company stuff :)

But blood should be free right? I mean for medical use at least(is there any other use)

Of course the amount of liquid(or other stuff) you sell change the cost of the product.

If you for example only produce/sell 1 litre of a product, then all your costs(plant, distribution, people, suppliers…) will be spread throuout this 1 litre you sell, but if you could sell 1000 litre of that product the cost per litre would be lower. Of course your overall costs will increase with your output increase, but not on the same level. That’s called Economy of Scale

https://www.britannica.com/money/economy-of-scale

there are a few cats that have 2 feet, even less