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

### Instruction:
 Duka linapanga kufunga na kuuza bidhaa zake zote. Wana bidhaa tofauti 2000 ambazo kawaida zingekuwa na thamani ya $50. Wanatoa punguzo la 80% na wanafanikiwa kuuza 90% ya bidhaa hizo. Walikuwa na deni la $15000 kwa wadeni wao. Kiasi gani cha pesa wamebakiwa nacho baada ya mauzo?


### Response:
 Waliuza bidhaa 2000*.9=<<2000*.9=1800>>1800
Walitoa punguzo la 50*.8=$40 kwa kila bidhaa
Hivyo kila bidhaa iliuza kwa 50-40=$<<50-40=10>>10
Hivyo wamepata 1800*10=$<<1800*10=18000>>18,000
Hivyo wamebakiwa na $18,000-$15,000=$<<18000-15000=3000>>3,000