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

### Instruction:
 Randy ana $30. Alitumia $10 kununua chakula cha mchana. Alitumia robo ya pesa alizosalia kununua barafu ya karanga. Ni kiasi gani cha pesa, kwa dola, Randy anachosalia?


### Response:
 Randy ana 30-10=<<30-10=20>>20 dola zilizosalia baada ya kununua chakula cha mchana.
Randy alitumia 20/4=<<20/4=5>>5 dola kununua barafu ya karanga.
Randy anachosalia 20-5=<<20-5=15>>15 dola.