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

### Instruction:
Gwen received a $900 bonus at work and decided to invest this money in the stock market.  She spent one-third of her bonus on stock A, one-third on stock B, and the remaining one-third on stock C.   After one year, stock A and stock B had doubled in value, while stock C had lost half of its value.  At the end of the year, how much were Gwen's stocks worth, in dollars?

### Response:
 Gwen alitumia theluthi moja ya bonasi yake kwenye kila moja ya hisa tatu, hivyo alitumia 1/3*900 = $300 kwenye kila hisa.
Baada ya mwaka mmoja, hisa A iliongezeka maradufu thamani yake na ilikuwa na thamani ya $300*2 = $600.
Baada ya mwaka mmoja, hisa B iliongezeka maradufu thamani yake na ilikuwa na thamani ya $300*2 = $600.
Baada ya mwaka mmoja, hisa C ilipoteza nusu ya thamani yake na ilikuwa na thamani ya $300/2 = $150.
Jumla yake, mwishoni mwa mwaka, hisa za Gwen zilikuwa na thamani ya $600+$600+$150 = $1350.