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

### Instruction:
A store decides to shut down and sell all of its inventory.  They have 2000 different items which would normally retail for $50.  They are offering an 80% discount and manage to sell 90% of the items.  They owed $15000 to their creditors.  How much money do they have left after the sale?

### 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