Do I have to pay Custom or other fees? And does the import tax fee and custom duties already included in the shipping cost?

Import taxes and custom duty fees do NOT included in the shipping cost.
All taxes and duties will be responsible by customers, including any customs and import taxes which may be a government requirement of import into your country.
These fees will be charged when your package reaches its destination country.
We recommend that customers contact their local customs office for details on how these charges are assessed and applied.
If you choose either DHL or Fedex express shipping service, buyers may be charged the “Advance Payment”.

See more information about the definition of “Advance Payment” from DHL: