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

### Instruction:
Doris earns $20 per hour by babysitting. She needs to earn at least $1200 for her monthly expenses. She can babysit for 3 hours every weekday and 5 hours on a Saturday.  How many weeks does it take for Doris to earn enough to cover her monthly expenses?

### Response:
 Doris analea mtoto kwa jumla ya masaa 5 ya wiki x masaa 3/siku ya wiki = <<5*3=15>>15 masaa.
Analea mtoto kwa jumla ya masaa 15 + 5 = <<15+5=20>>20 kwa wiki.
Anahitaji kufanya kazi kwa $1200 / $20 kwa saa = <<1200/20=60>>60 masaa ili kupata kiasi anachohitaji kufidia gharama zake za kila mwezi.
Itachukua 60 masaa / 20 masaa = <<60/20=3>>3 wiki kwa Doris kupata kiasi anachohitaji kufidia gharama zake za kila mwezi.