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

### Instruction:
Mason is cleaning out all the junk in his attic. 20% of the items are useful, 10% are valuable heirlooms, and 70% are junk. If Marcus's attic has 8 useful items in it, how many junk items does it have?

### Response:
 Kwanza tafuta idadi ya vitu katika paa kwa kugawanya idadi ya vitu vya manufaa na asilimia ya vitu vya manufaa: 8 vitu / .2 = <<8/.2=40>>40 vitu
Kisha eleza asilimia ya vitu vya manufaa na vitu vyenye thamani kwa asilimia ya vitu vya takataka: 100% - 20% - 10% = 70%
Kisha mara idadi ya jumla ya vitu katika paa kwa asilimia ya vitu vya takataka ili kupata idadi ya vitu vya takataka: 40 vitu * 70% = <<40*70*.01=28>>28 vitu