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

### 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:
 Chaque mois, elle gagne $40 + $20 = $<<40+20=60>>60
Elle économise $60/2 = $<<60/2=30>>30 chaque mois
Il lui faudra $150/$30 = <<150/30=5>>5 mois pour économiser suffisamment