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

### Instruction:
Jack orders 3 sandwiches that cost $5 each.  He pays with a $20 bill.  How much does he get in change?

### Response:
 Gharama ilikuwa 5*3=$<<5*3=15>>15.
Hivyo atapata 20-15=$<<20-15=5>>5 kama mabadiliko.