Yep, your math is right but we did have a small surcharge in 2011. The $50 is a onetime initiation fee. On the other hand, the next meeting is in 2012. I'm afraid that while all members in 2011 paid the assessment, and I would guess that the assessment won't be charged in 2012 (we're in good financial shape), I'm not in authority and it would be an issue on which the membership vote - like we did for the 2011 assessment ($25 or something like that).
There are always some club officers at the field on Saturdays and you can find contact information for Art on the club website. He would be a good one for specific questions.