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

### Instruction:
 Jason anamngojea mteja ambaye anadai $15.00. Jimbo la Jason linatoza kodi ya 20% kwa mauzo ya mikahawa. Ikiwa mteja anampa Jason noti ya $20 na kumwambia aendelee na mabadiliko, Jason atapata bahshishi kiasi gani?


### Response:
 Kwanza, hesabu kiasi cha kodi kwa kuzidisha $15.00 na 20%: .20 * $15.00 = $<<.20*15=3.00>>3.00
Kisha toa gharama ya chakula na kodi kutoka $20 ili kupata bahshishi ya Jason: $20.00 - $15.00 - $3.00 = $<<20-15-3=2.00>>2.00