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

### Instruction:
John goes to the store to buy Slurpees and gives them $20.  Slurpees cost $2 each and he got $8 in change.  How many Slurpees did he buy?

### Response:
 Alitumia 20-8=$<<20-8=12>>12 kwa Slurpees.
Hivyo alinunua Slurpees 12/2=<<12/2=6>>6.