How much money would 2 kids make in a lemonade stand in 3 hours?

Me and my sister are going to do a Lemonade Stand tomorrow in Oakland New Jersey (we live here)and at least 7 workers are going to be working on our road. The Lemonade cost $1.00. How much money do you think that we are going to make from the workers plus the city. We also live on a dead end.