Average wage for cleaners?? (São Paulo)

Hi everyone, so moved here a couple of weeks ago, I'm in Alphaville,and I'm still trying to get the house in order( sigh) .
I've used the company Helping a couple of times who are great but I don't know if I want to keep using them or get a cleaner more regularly. I have no idea on the kind of wage I should be paying per hour? Could anyone give me an idea please, I will interview a couple of people next week and I would like to know what I should be expecting to pay! Thanks for your input,
Georgie