Below is an instruction that describes a task. Write a response that appropriately completes the request in Swahili. Please answer in Swahili.

### Instruction:
 Cory alinunua meza ya patio na viti 4 kwa $135. Meza ya patio iligharimu $55. Ikiwa kila kiti kina gharama sawa, kila kiti kiligharimu kiasi gani?


### Response:
 Viti 4 vina gharama ya $135 - $55 = $<<135-55=80>>80.
Kila kiti kinagharimu $80 / 4 = $<<80/4=20>>20.