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

### Instruction:
 Leticia, Scarlett, na Percy wameamua kula katika mgahawa wa Kigiriki kwa chakula cha mchana. Bei za vyakula vyao ni $10, $13, na $17, mtawalia. Ikiwa kundi hilo linampa mhudumu wa meza asilimia 10 ya chakula, mhudumu anapaswa kupokea kiasi gani cha hongera kwa dola?


### Response:
 Jumla ya bili ni $10 + $13 + $17 = $<<10+13+17=40>>40.
Hongera inafikia $40 * 0.1 = $<<40*0.1=4>>4.