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

### Instruction:
 Edith ni mpokeaji katika ofisi ya eneo na anapanga faili katika makabati. Alikuwa na faili 60 na alimaliza kupanga nusu yao asubuhi hii. Ana faili nyingine 15 za kupanga mchana na faili zingine zimepotea. Ni faili ngapi zimepotea?


### Response:
 Edith tayari amepanga faili 60 / 2 = <<60/2=30>>30 asubuhi.
Ana faili zilizobaki za kupanga, hivyo bado ana faili 30 + 15 = <<30+15=45>>45 ofisini.
Hii inamaanisha kuna jumla ya faili 60 - 45 faili zilizopangwa = <<60-45=15>>15 faili zilizopotea.