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

### Instruction:
 Kuna mgahawa wa haraka unatoa huduma ya kusafirisha chakula bure kwa ununuzi wa chini wa $18. Danny alinunua mikate 2 ya robo paundi kwa $3.20 kila moja, chipsi kubwa 2 ambazo zinagharimu $1.90 kila moja, na maziwa ya barafu 2 ambayo yanagharimu $2.40 kila moja. Ni kiasi gani cha chakula zaidi anapaswa kununua ili apate usafirishaji wa bure?



### Response:
 Jumla ya chakula Danny alinunua ni $3.20 + $3.20 + $1.90 + $1.90 + $2.40 + $2.40 = $<<3.2+3.2+1.9+1.9+2.4+2.4=14.6>>14.6
Usafirishaji wa bure unatolewa wakati jumla ya chakula kilichonunuliwa ni $18 au zaidi.
Hivyo, Danny anahitaji kununua chakula cha thamani ya $18 - $14.60 = $<<18-14.6=3.4>>3.4 zaidi ili apate usafirishaji wa chakula bure.