I highly doubt that its the first time that banking money has gone missing?
I find it really surprising how quickly some people are jumping in to assume that an employee would happily STEAL $200???!! really??? its not worth losing your job for $200 - and most people are smart enough to know that - lets assume innocent till proven guilty huh???
Yes its stressful to lose that much money - and if you aren't happy with the admin staff and their attitude, by all means tell the principal, but I dont think its fair to accuse her of stealing the money, there is simply no proof.