Look for SEO for our website. Read details before answer !

Hello,
>To avoid people who don’t read the detail, we will black list the freelancer who answer in the first 5 minutes !
Our website is www.xoopro.com, we are selling software POS.
We have a fix budget of 150 USD/ month.
What can you do for us for this price every month to improve our ranking and natural traffic.
We don’t talk about the price (Don’t give an other price), we talk about the REAL CONTENT of the job, describe EXACTLY what you will do.
Starting February.
Regards

update:
PLEASE READ CAREFULLY AND ANSWER ONLY WITH A PROPOSITION.
TELL US EXACTLY WHAT YOU WILL DO. (NO CUT AND PASTE BLABLA….)
THANK YOU