Question about Canon Pcc-Cp400

For postcard-sized photos (10cm x 14.8cm), you need a suitable cartridge with colour ink and the corresponding amount of photo paper. For example, there is the RP-108 set with 6x18 sheets of paper (= 108 photos) and two colour ink cartridges with 54 printouts each (= 108 prints).

It is not a cartridge, but a paper cassette for the 54x86mm format