I suggested that you cut down on the educational/extracurricular expeses on your thread in F&F. The classes/activites that you listed for your DS sound wonderful and amazing, but if you can't afford it, you can't afford it, kwim?
FWIW, we used to be HSers also, and we spent a lot more money back then on extracurricular expenses. My kids took science and art and Spanish classes, they went on frequent field trips and belonged to more clubs. But now that they're in school, we've cut back on most of that. The only things they do now are community ed sports. They get enough socialization and are interested enough in the things they learn at school that they only want 1 or 2 'extras' instead of the 3-4/week that they had before.
To be honest, there are a few experiences that I'd like to be able to provide for my kids, but it's just not in the budget right now. I'd love to enroll them in art classes, but at this point we settle for doing artsy things at home and learning about art from library books. I'd also really like my kids to take piano lessons, but it's not a priority right now, so I'm slowly teaching them the basics myself at home.
I think it comes down to priorities.....
And in answer to you originial question

(wow, did I digress there)
School fees: at the beginning of the year I paid a $30 shared school supply fee for each of my kids and a $50 fee to provide them with juice/milk at snack time. I budget $15/month for school field trips per child and have probably paid about $30/child for other various fees and expenses so far this school year .
Extracurriculars: Right now my girls are dancing with a low-cost community dance group, lessons are about $20/month (plus a one time $120 costume fee). My kids also participate in community ed sports, which tend to cost $25-50/season. I'd estimate that I'm paying about $25/month per child for extra curriculars this school year.