"You can't have our trash because we don't have a way to charge you for it"

I've been calling around various grocery stores this week, trying to get a hold of pork fat trimmings so that I can make my own lard for some recipes. One of the stores I called today said that they couldn't give me the trimmings because they don't have a code for it. I forget exactly what I said, but it was something to the effect of, "so you're just going to throw it away instead?" "Yes."

I understand that it does require some effort to separate from the rest of the waste, so I don't mind paying a bit, but its upsetting that they have no way to pass scraps along to someone who will use them instead of just tossing them in the waste.

Edit for anyone invested: I called around to a few other stores after making this post. One or two mentioned that they don't necessarily throw all of those bits away, but often use them for other products, such as sausages. I also found a store that will be putting aside their trimmings for me tomorrow, and they should have more than I need. It's almost an hour away on the bus, but right next to another store that should have any other hard to find ingredients that I'll need for the tamales.

Also interesting was that different locations of the same chains had different answers for me regarding even their ability to provide the scraps to me, so the suggestions that a manager might be able to make it happen are probably very accurate.