I think you are entirely right to question the $700 fee with only one tournament. Plus anohter $350 for rec? You are talking about over $1000. That seems really strange to me.
However, and I am sure you would do this, approach it without the accusation that something wrong has gone on or that someone is misappropriating the money.
Maybe something like writing (or talking) to the treasurer or organization mananager, and asking, something like "Hello, I was looking at my budget and I have some questions about our softball schedule. Perhaps there has been a miscommunication. I am trying to understand why our fees are $700 this season but in the past it has been $__ and we did 3 tournaments. Could you help me understand? Maybe I am missing something. Thank you!" Something like that. I do think you have every right to understand where your significant amount of money is going.
For context: we are paying less than $500 for spring AND summer season with 7 tournaments and many extra local non-tournament games that cost money for the Umps.