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

### Instruction:
 Wally hununua dubu kwenye mbuga. Dubu moja inauzwa kwa bei ya $4.00 kwa dubu la kwanza na punguzo la senti 50 kwa kila dubu baada ya hapo. Wally analipa kiasi gani kwa dubu 101?


### Response:
 Dubu la kwanza lina gharama ya $4.00, dubu la pili lina gharama ya $3.50, dubu la tatu lina gharama ya $3.00, na kadhalika.
Gharama jumla ni 4 + 3.5 + 3 + 2.5 + … + 0.5 = $176.00