When you purchase from Medshop's localised websites -
and the shipping address is domestic to those locations, you only need pay the amount show in the checkout.
Additional customs clearance charges related to the value of the good, would covered in the DDP (Delivery Duty Paid) basis which means that all relevant import taxes and duties are included in the final purchase price.
Taxes and duties are calculated according to your shipping destination customers in Australia and Singapore will be charges the standard local taxes as shown in checkout.
Orders from the website medshop.com unless the delivery address is in Singapore or Australia will be shipped DDU (Delivery Duty Unpaid). So once your order arrives at its destination you will be required to pay all import duties, customs and local sales taxes levied by the country you are shipping to, in order to release your order from customs.