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

### Instruction:
 Kalamu inagharimu $9 zaidi ya penseli. Ikiwa penseli inagharimu $2, pata gharama ya jumla ya vitu vyote.


### Response:
 Penseli inagharimu $2.
Kalamu inagharimu $9 zaidi ya penseli, hivyo $9 + $2 = $<<9+2=11>>11.
Hivyo gharama ya jumla ya vitu vyote ni $2 + $11 = $<<2+11=13>>13.