I don't understand your question. Are you asking as a coach? I don't really have a budget. I have funds where we raise money and keep them in the softball account. We just put a huge amount of money in there from concessions stands that the HC and players worked. However, we have to do major work on our diamonds and so, that fund will be depleted quickly. As long as we are always working to try to put monies into the softball fund, our AD will work with us. Also, we have one booster club for all of the sports in our HS. The booster club tries to help all sports out based upon needs. As another example, I am the HC in Girl's Golf. I put $90 in a few weeks ago and next week I will put $250 in. We are buying new golf bags for my 10 member team. If you do the math, I'm a little short for what it would cost to buy 10 new golf bags. LOL
Oh, and no, the coaches aren't told what it cost to do a game.
Edited to add:
If you are asking as a parent and want to know the cost/game per your child getting on the field, then you are forgetting all of the practices. My teams practice 6 days a week. We practice a minimum of 2 1/2 hours but mostly closer to 3 hours. We have great facilities including two turfed cages, a bunting station, ... for hitting, screens for all kinds of things, ... Players and parents get their money's worth and more in my opinion.
So you have 55 kids in the program? Did you get an itemized list that adds up to 55K a year?