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

### Instruction:
Roe saved $10 per month from January to July and saved $15 per month from August to November. How much should she save in December so she will have a total savings of $150 in the year?

### Response:
 Kwa miezi 7 kuanzia Januari hadi Julai, akiba ya Roe ilikuwa $10 x 7 = $<<7*10=70>>70.
Kwa miezi 4 kuanzia Agosti hadi Novemba, akiba yake ilikuwa $15 x 4 = $<<15*4=60>>60.
Hivyo, akiba yake jumla kutoka Januari hadi Novemba ilikuwa $70 + $60 = $<<70+60=130>>130.
Hivyo, anahitaji kujiwekea akiba ya $150 - $130 = $20 mwezi wa Desemba.