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

### Instruction:
A company is hosting a seminar. So far, 30 attendees from company A have been registered; company B has twice the number of attendees of company A; company C has 10 more attendees than company A; company D has 5 fewer attendees than company C. If a total of 185 attendees have registered, how many attendees who registered are not from either company A, B, C or D?

### Response:
 Kuna washiriki 60 kutoka kampuni B.
Kampuni C ina washiriki 30 + 10 = <<30+10=40>>40.
Kampuni D ina washiriki 40 - 5 = <<40-5=35>>35 waliosajiliwa.
Hivyo, jumla ya washiriki kutoka kampuni A, B, C, na D ni 30 + 60 + 40 + 35 = <<30+60+40+35=165>>165.
Hivyo, washiriki 185 - 165 = <<185-165=20>>20 sio kutoka kampuni A, B, C, au D.