Which ink cartridges are optional?

• The following optional ink cartridges are available from the Epson Store:
  
  

  Cartridge	Part Number
  Photo Black 220ml	T603100
  Cyan 220ml	T603200
  Vivid Magenta 220ml	T603300
  Yellow 220ml	T603400
  Light Cyan 220ml	T603500
  Vivid Light Magenta 220ml	T603600
  Light Black 220ml	T603700
  Light Light Black 220ml	T603900
  Matte Black 110ml	T611800
  Matte Black 220ml	T612800