What is the cost of keeping an animal alive in a shelter?

I was writing a speech, pro neutering/spaying a pet. I was wondering what the cost of keeping an animal alive in a shelter is. How much they spend on each animal in terms of food, space, vaccines, and bills in general.

It costs a lot, but it depends at the same time. I work for a shelter and we work with different vet hospitals so it depends on what the individual vet hospital charges. Most of the time the animals only go to the vet for an exam, maybe blood work, depending on if the animal is sick or it's age, to get fixed and a rabies shot, unless the animal gets sick and needs supportive care or stronger meds than what the shelter has in stock. At the shelter I work at we have most of the vaccinations and tests at the shelter. For dogs, we give distemper shots, bordatella, we test for heart worm/lyme/erlichia, we de worm the dog, give heart worm preventative and flea and tick preventative at the shelter. Everything else is done at the vet. For a cat, we test for aids and leukemia, give distemper, deworm them, flea/tick preventative, and the rest is done at the vet. We have meds we administer as well if an animal were to get sick as well as fluids, depending on how sick they got. It also depends on the facility. We are more of a cat facility, we don't get many dogs in. Some shelters are more of a dog facility. A lot of what is done at the vet depends on the animals weight as well, the bigger the dog the more we get charged. For one animal, it costs maybe $200-300 a month, depending on the animals weight, and that's if the animal doesn't get severly sick and have to be hospitalized. That amount includes the basic vaccines, getting the animal seen at the vet, (bloodwork if needed, getting fixed, rabies shot) and food. That is the inital month, once vaccinations are done and the animal is fixed, hoping that it doesn't get sick, it's pretty much just the cost of food that adds up. Again this is what the shelter I work at does, some shelters, if the animal gets severely sick don't have the resources to hospitalize the animal and it ends up euthanized.