Hi,
I have experience in fixing the malware on many websites. The final price depends on the size and nature of the website. But, it will definitely be under $250. I can give you 100 % assurance of fixing the malware and ensure that the problem doesn't repeat. But, this requires monitoring on a regular basis - I will take care of this.
I can also help you with optimizing the website. I have hands on experience with SEO / online promotion.
Regards,
Sudhani