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

### Instruction:
 Percy anataka kuokoa pesa za kununua PlayStation mpya, ambayo inagharimu $500. Anapata $200 kwenye siku yake ya kuzaliwa na $150 kwenye Krismasi. Ili kupata pesa zilizobaki, atauza michezo yake ya zamani ya PlayStation kwa $7.5 kila moja. Anahitaji kuuza michezo mingapi ili kufikia lengo lake?


### Response:
 Percy ana $500-200-150 = $<<500-200-150=150>>150 zilizobaki za kupata.
Anahitaji kuuza michezo 150/7.5 = <<150/7.5=20>>20 ili kufikia lengo lake.