They are all just symbols. No single method is right or wrong, it just depends what is the "norm" where you are from.
I lived in Russia, and guess what- you are gonna confuse people by writing your numbers the "American" way.
Your options are to (in no particular order):
A: Get used to working with other cultures/systems
B: Get everyone you are working with to standardize to one system or another
C: Get away from any sort of global engineering and continue doing things the "American" way because that's how it's always been done
PS. I love the metric system, but I still have to put up with my company using standard most of the time.