Yeah, I chose commerce as an elective in Year 9 and 10, and I really liked doing the topics surrounding business. At the end of year 10, we did an introduction of Economics, and I really enjoyed it. I think i would go okay in both Business and Economics, but however I might drop them in year 12, I'm not sure yet. I might change my mind in 1 year time.
You too =) Good luck with your studies!