To the right is a screen shot from the Windows 8 Store app on my machine, note the app called Cozy and in particular its price, it is in dollars… and I live in South Africa where we use Rands. :/
The store settings are controlled by the Windows Region settings, so to fix this you need to change the settings, which you can get by search for region:
Once in the region app go to location and change it from United States to South Africa, or where ever you are:
Next time you launch the store (you may need to do a reboot) it will be in the right country!