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

### Instruction:
Dianne runs a store that sells books.  37% of her 1000 customers end up returning their books.  Her books all cost 15 dollars apiece.  How much money does she keep in sales after subtracting the returns?

### Response:
 Dianne alipata dola 15000 kwa mauzo kwa sababu alikuwa na wateja 1000 kila mmoja kununua kitabu cha dola 15.
Asilimia 37% ya wateja wake walirudisha vitabu vyao, ambayo inamaanisha watu 37/100*1000=<<37/100*1000=370>>370 walirudisha vitabu vyao.
Watu hao 370 walirudisha vitabu vyenye thamani ya dola 370*15=<<370*15=5550>>5550.
Faida ya Dianne ilikuwa dola 15000-5550=<<15000-5550=9450>>9450.