Mike744,
For the tone of your response I can only assume that you are rather young and inexperienced. I don't propose to discuss the contents of an email to me in public. Just go and ask your committee.
In terms of official, any communication in response to a formal inquiry at such a time where the response is on behalf of "the club" is most certainly official. That's why clubs have office bearers; to respond on behalf of the club to questions about the operation of the club.
I note that neither you nor anyone else has responded to the questions about costs on this thread. However you have inadvertently answered those questions for myself and others.
BTW the questions on this thread were about costs, not about revisiting history.