It really depends on the topics you write about, how much competition there is, whether you're on AdSense alone or on the HP Ad program (because pay will differ) and how many hubs you have. And there is not a solid formula for each factor, because someone with a true niche who has only a few great hubs can make that amount or more, while someone with equally great hubs that aren't as searchable or are on topics that are saturated may get nowhere near that amount.
One thing to remember - the income won't come quickly (usually) - so don't get discouraged. Just keep writing good content, and promote it sensibly. Don't spam on FB, for example - but do share appropriately when it makes sense. Be active on HP, and you will get views from your colleagues here, and those views also earn money if you're on the HP Ad Program.
Good luck! Glad you are here!