Please include GST and VAT in the prices, since we do assume that the price you do enter includes General Sales Tax or Value Added Tax. If the certain item has very high price oscillation depending on the store or other factors, please enter the price you think the locals will most likely pay.
If something is not applicable to this city or you don't know the value, please just leave empty. If the field is empty, nothing will be saved in the database.
Numbeo doesn't show previous values but keeps all values. Information you enter might not show immediately. Some information are left for manual review to prevent vandalism.