How much weight could I lose if I...?

Run 4 miles, do 30 push ups, 50 sit ups everyday. Do Zumba on the Wii for 45 minutes a day. Eat 800-1000 calories a day, including lots of veggies, fruit, water, eggs, salad, and veggie burgers. (Vegetarian 2 years). I am a female, 19, and weighing 183, but I look 150 due to muscle. How much weight could I lose in two months?