Does anybody knows what is the monthly sallary in brazil?

That depends on the job and skills involved.

The present Minimum Salary is R$678,00 per month about USD $335.00 per month.

The forecast is for the Minimum Salary to increase to R$720,00 in January or about USD $360.  Cheers,
  William James Woodward – Brazil Animator, Expat-blog Team