Dependent visa If the salary is less than 400 Bahrain

Hello

My gross salary is more than 400 but my company in LMRA registered my net salary which is around 200 BD. I would like to know that if there is a way to process the dependent visa for my wife and son on my visa.

I have little knowledge that if my company apply the dependent visa for my wife and son then the visa can be approved or the agent can also do that but Agent would need a document to be signed from my company owner. I am looking for a whole knowledge if I can process the dependent if yes then How can I process. 

Salary would need to be changed at SIO.