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

### Instruction:
Mary earns $20 washing cars and $40 walking dogs each month. If she puts half of that money away each month how long would it take her to save $150?

### Response:
 Kila mwezi anapata 20+40=$<<20+40=60>>60
Anahifadhi 60/2=$<<60/2=30>>30 kila mwezi
Kuokoa $150 itamchukua 150/30=<<150/30=5>>5 miezi