$$$$ is always appreciated. We also leave what ever hasn't been opened in the fridge for our people, except, of course, the Belikins and Lighthouses...that goes in the closet for next time.
We put everything in a bag, and place on the top shelf of the fridge, and leave a note for them. It is always appreciated, at least they always tell us they have used it. Most likely just take it home and add to the six million packs of unpopped corn they already have.
It never hurts to ask them if they can use the foods, it's better than throwing it away..and they can always use the money.