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

### Instruction:
 John hununua mifuko ya popcorn kwa $4 na kuiuza kwa $8. Anapata faida kiasi gani kwa kuuza mifuko 30?


### Response:
 Anapata faida ya 8-4=$<<8-4=4>>4 kwa kila mfuko
Hivyo anapata faida jumla ya 30*4=$<<30*4=120>>120