Currency Bug

I changed my currency from $ to R, but now when I put my hourly rate as R150 for some reason it's showing up that I'm earning R15,000.00 after an hour of work and I have no idea how to fix this. I tried changing it back to $ but it's doing the same thing. No matter how many times I change it to R150 and save it, it keeps reverting to R15,000.00.