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

### Instruction:
Darryl is an inventor who just designed a new machine. He had to pay $3600 for the parts to construct the machine, and $4500 for the patent he applied for once he built it. If the machine sells for $180, how many machines does Darryl need to sell to break even after the costs?

### Response:
 Darryl alilipa 3600 + 4500 = $<<3600+4500=8100>>8100 kwa gharama za sehemu na hati miliki.
Hivyo, Darryl anahitaji kuuza 8100 / 180 = <<8100/180=45>>45 mashine ili kufikia gharama zake.