Your earnings are calculated by several factors including what type of traffic you are sending, if it is desktop or mobile, what platform the visitor has or if it’s a wifi or carrier connection, including many other parameters. All these variables along with the advertisers bids and budgets, the demand, how well your traffic performs on their offers, all play a part into how much you will earn. Based off this information, it is impossible to predict what the earnings will be. But remember that creating a quality website, with quality content and good traffic will be the best thing you can do for long term stable income.