I buy groceries. I try to buy what I need so I have enough but I'm not wasting anything. Having enough is more important than not wasting anything. So, ther

I buy groceries. I try to buy what I need so I have enough but I'm not wasting anything. Having enough is more important than not wasting anything. So, there is always a non zero amount of food I have to throw out as it didn't get eaten. I could optimize this to zero, but it would likely cost me _more_ to do that than the return would be _worth_. I suspect the same would be true here.