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

### Instruction:
John buys bags of popcorn for $4 and sells them for $8.  How much profit does he get by selling 30 bags?

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