Chances + Work Experience Q

If someone would be so gracious, I’d like a rough estimate at relative chances at admission to SFS.

GPA: 3.6 UW, 4.2 W. Additionally, I attend a college prep school with a comparatively harsher scale; if recalculated to public standards, the UW is a 3.79. If an applicant could answer, is there a way to note something like that?
34 ACT
I plan to take various SAT subject tests.
AP: Chemistry, World History, US History, Literature, Biology, Government, Comparative Government, Macroeconomics, Psychology, Physics 1

EC: Debate Club President (various midlevel awards)
MUN Vice President
WYSE (two silver medals English, one gold medal English)
Varsity Academic Bowl Co-Captain
Tri-M member
Pep Band, Jazz Orchestra, Pit Orchestra

As for others, I was nominated for and won a conference held by a State Representative for HS in the area.
At time of application, I will have worked, paid, for a different State Rep for a year, with weekly interaction, and will have an excellent letter of recommendation from her. Is this work experience/letter taken into account comparatively?

Thanks for any consideration or information, it is appreciated.