0.15*(lab score as %)  
 + 0.125*(exam 1 as %) + 0.125*(exam 2 as %) + 0.125*(exam 3 as %) 
 + 0.275*(final exam as %)
 + .17*(capa as % after dropping worst)
 + .03*(average "recitation score" as %)

This gives you a score from 0-100. 
The class average for this score is 74% (which is thus the approximate B/C boundary).
The "recitation score" is obtained as follows: find your average quiz
score (as %), and your average capa long answer score (as %) then
average THOSE two. The TA's were normalized to account for different
grading styles, so you may have gotten a  slightly different
score than you thought, for both labs and quiz/long answer. This is not
a mistake, it's generally a small correction, and everyone has been
treated equally.